Signs of bad idle control valve - Symptoms of a Faulty Idle Air Control Valve. A faulty or dirty ICV can exhibit one or many of the following symptoms: 1. Unusual Idling Behavior. The IACV’s primary role is to regulate your car’s idle when the accelerator isn’t pressed. When the IACV is faulty, it may cause the idle speed to deviate from the ideal range, leading to rough ...

 
Summary. An intake manifold runner control (IMRC) valve is part of the system that opens and closes the flaps inside variable intake manifolds. An illuminated check engine light, engine performance issues, and reduced fuel economy are some common symptoms of a faulty IMRC valve.. 2015 shasta airflyte

The number one cause for high idle is an imbalance in air pressure. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely fai...Unlike a lot of other engine components, the idle air control valve doesn’t have a service or replacement interval. But it will go bad over time due to wear and tear, and here are the symptoms to look out for: 1. Abnormal Idling Behavior. First and most obviously is that your car will idle in a weird way.Jun 22, 2013 ... Idle will be normal once the car is heated up and the IAC valve its unplugged. I have the same problem, took the IAC out blew air through and it ...Key Takeaway. Symptoms of a bad or burnt intake and exhaust valves include a decrease in power and acceleration, trouble starting the vehicle, poor fuel mileage, burning smell, rough idle, valve noise, and backfiring. A burnt valve can be caused by issues such as improper sealing, overheating, faulty exhaust valves, carbon buildup, or …This will result in engine misfires and performance problems. While poor engine performance can also be the sign of other problems, like a symptom of a bad fuel filter, it often points to a faulty EGR valve. #4. Smell Of Gasoline. If you smell gasoline as your car runs, it could be the result of a failing EGR valve.How to Test A Car With Bad Idle Air Control Valve Symptoms. Vacuum leaks and electrical issues, among other factors, could create the illusion of a faulty idle air control valve. It is crucial to …Nov 2, 2002 · Received 1,725 Likes on 1,395 Posts. Testing Idle Air Control Valve. Yes, while it is running (idle). This is just a test to get the throttle valve right. You will probably get some codes from the computer too, but these can be erased by disconnecting the battery for a few seconds (engine off). Reply Like. Here are the most common signs of a bad IAC valve and how to test it. Table of Contents. What Is An Idle Air Control Valve? How Does An IAC Valve Work? Symptoms Of A Bad Idle Air Control Valve. — Rough Idle. — Check Engine Light. — Car Starts, Then Dies. — Backfiring. — Difficulty Starting. How To Test An Idle Air Control Valve.98 Honda Civic EX 1.6L VTEC Automatic. Check Engine Light came on with the code P0505-IDLE AIR CONTROL VALVE(IACV). After cleaning the IACV of the carbon dep...Apr 17, 2011 ... Most IAC failures manifest themselves as a start-and-stall condition. Generally speaking, the engine will catch and run for a second or two, ...In this video, you will learn 4 symptoms of a bad idle air control valve. Watching this video will help you diagnose to see if it is time to replace your idl...This results in poor fuel combustion, reduced engine power, and slower acceleration. Additionally, the engine may lose its ability to idle smoothly. 2. Hard Starting. Another symptom of a bad reed valve is hard starting. When the reed valves fail to open or close correctly, the engine struggles to start.2. Rough Idling. Rough idling is another common symptom of a bad torque converter. If you feel that your idle is a bit jumpy and sometimes too low and sometimes too high, it could be a torque converter problem. If the torque converter is faulty, it might create unexpected pressures inside the torque converter, which can cause rough idling.2. Rough Idling. Rough idling is another common symptom of a bad torque converter. If you feel that your idle is a bit jumpy and sometimes too low and sometimes too high, it could be a torque converter problem. If the torque converter is faulty, it might create unexpected pressures inside the torque converter, which can cause rough idling.Code 15 means the coolant temp sensor is reporting the temp is stuck at -40*. This usually causes an extremely rich mixture or flooding and no starts. This could explain your surging idle. If this truck has the electronic transmission like a 4l60e or 4l80e the faulty coolant or tps reading will definitely affect the transmission. Coolant temp ...Method 1 of 3: Troubleshooting issues with the idle control valve. The idle control valve, also commonly referred to as the idle air control valve, is designed to control and regulate the engine idle speed, increasing and decreasing it as necessary to keep up with operating conditions. On most vehicles, this component is attached to the intake ...The solenoids may control the vacuum supply to the EGR valve or operate the valve directly. A computer, which is often referred to as the powertrain control module (PCM), operates the solenoids based on input from various sensors. Symptoms of a Bad EGR Valve. When the EGR valve fails, it can cause several noticeable symptoms. Here are the most ...Find out the symptoms that show the bad condition of the idle air control valve in your vehicle. #1. Fluctuate Idle Speed. The main function of the idle air control valve is to manage the engine’s idle speed. In this way, the bad idle air control valve will cause the engine to have a fluctuating idle speed. In other words, the speed could be ...A bad idle air control (IAC) valve may be the culprit. If you don’t sort it out quickly, it can lead to costly car engine repairs. But fear not! We’ll identify the most common symptoms of a bad idle air control valve so you can avoid unnecessary repairs.Oct 27, 2009 ... ... signs of leakage. Upvote0. Oct 27, 2009 · #5 ... well you have a idle air control valve, a fast idle control valve. ... My bad idle was several ...Jan 11, 2016 · 3. Whining noise while turning the wheel. A whining noise may also be present if your power steering control valve is failing. This noise is usually heard while you are turning a corner, or turning the wheel in general. Whining may also be heard at idle. No whining noises should be heard while the vehicle is turning, so this is a red flag and ... Knowing the symptoms to identify and fix the issue is always best for your car. Let’s know them below: Irregular Idle Speed. The most common and direct symptom of the bad IAC valve is irregular or fluctuating idle speed. The IAC valve works to manage your car engine’s idle speed.The most common thing you’ll notice from a bad vapor canister purge valve is that you’ll get a check engine light that you weren’t expecting. While the symptoms can change depending on whether or not the valve is stuck open or closed, one thing that shouldn’t change is that you should get a check engine light. 2.Typically, as the engine warms up, the engine operates normally. Only once, the problem occurred with the engine at normal operating temperature. To remove the idle air control valve appears to be a very simple task (Only two screws from an easily accessible location.) I’m sure there’s a proper technique for checking it’s function to ...In this video, you will learn 5 symptoms of a bad purge valve. Watching this video will help you diagnose whether it is time to replace your purge valve. You...A new challenger has emerged in the gaming hardware category. Game distribution giant Valve today announced the launch of Steam Deck, a $399 gaming portable designed to take PC gam...Dec 10, 2009 ... Poor idle..if you disconnect it, it will probably stall. The idle control valve words in concert with the throttle potentimeter, ...What I've tried: Cleaned the throttle body. Smoke checked the engine and determined there are no vacuum leaks. Replaced the IAC valve with a brand new one, and verified that it is working. Cleaned the ECM/PCM's electrical terminals and lightly applied dielectric grease to connections. Idle relearn procedure after each.A bad PCV valve will affect the performance of your vehicle, so there are a few signs to watch out for before the valve completely fails: 1. Excessive oil consumption and leak. A bad PCV valve may have a leak, which will cause excessive oil consumption. In addition, you may also notice oil leaking through the seals and dripping on to the floor ...Signs and Symptoms of a Bad Idle Air Control Valve A failing IAC valve often exhibits specific symptoms that, if noticed early, can prevent significant engine damage. Key symptoms include rough idling, stalling, and erratic engine behavior. Identifying Signs of a Bad Idle Air Control Valve. Recognizing the symptoms of a bad IAC valve can help you diagnose problems early, preventing potential damage to your engine. Some of the most common signs include: Rough Idling: One of the primary symptoms of a bad idle air control valve is when your car is difficult to start and once started ... When your vehicle’s idle control valve malfunctions, it can cause all sorts of issues for your car, and on some rare occasions, it will stall. Normally, a bad idle control valve will throw off a few signs that will alert the driver of a potential problem. The following reasons are the most common symptoms of a faulty idle control valve.See also Emission Control Systems. Common symptoms of a bad AIR check valve include: Illuminated Check Engine Light. Your car’s primary computer, which is often referred to as the powertrain control module (PCM), monitors the operation of the AIR system.Summary. An intake manifold runner control (IMRC) valve is part of the system that opens and closes the flaps inside variable intake manifolds. An illuminated check engine light, engine performance issues, and reduced fuel economy are some common symptoms of a faulty IMRC valve.Here are some solutions when engine valve failure occurs: Identify the symptoms: Common symptoms of failing engine valves include misfires, loss of power, rough idle, excessive oil consumption, and unusual engine noises. If you experience any of these symptoms, it is important to address the issue promptly.Check Engine Light. A surefire indicator of IMRC issues is the illumination of the Check Engine Light (CEL) on your dashboard. When the IMRC malfunctions, it often triggers specific Diagnostic Trouble Codes (DTCs) that can be retrieved using an OBD-II scanner. Common codes are P2004, P2005, P2015, P200A, and a select few others.Jun 22, 2013 ... Idle will be normal once the car is heated up and the IAC valve its unplugged. I have the same problem, took the IAC out blew air through and it ...There are plenty of occasions where you might find your car idling. In a long drive through, picking someone up from work, or just sitting in your driveway. If you're idling longer...When idling, the idle air control valve closes, creating a high vacuum in the manifold forcing engine oil around the seals. ... Signs of Bad piston rings. Piston rings are cast iron or steel split rings that are fitted to the pistons in your engine. Most cars have at least 3 piston rings per piston and their job is to seal the combustion ...That means you’ll need to pay both parts and labor costs. The average replacement cost of an idle air control valve is between $200 and $600. The parts could cost anywhere from $60 to more than $400, while the labor is between $150 and $400. Of course, the labor cost really depends on the hourly rate of the mechanic.Apr 5, 2018 · The idle speed isn't user-defined, but it is necessary to make sure the conditions are right for the ECU to control the idle speed. Fully warm up the car. Drive it around the block if necessary. Disconnect the electrical connector for the AAC valve. Turn the Base Idle Screw clockwise until the idle drops to about 650 RPM. PHILTOP Idle Air Control Valve Throttle Position Sensor AC158 Compatible with 1997-2002, Ranger 1999-2003 3.0L, Explorer 1996-2001 5.0L, Taurus 1997-1999, Expedition 1998-2000 4.6L 5.0 out of 5 stars 1Oct 11, 2022 · The most common and direct symptom of the bad IAC valve is irregular or fluctuating idle speed. The IAC valve works to manage your car engine’s idle speed. It comes with a preset program that constantly maintains and regulates its idle speed. When this valve goes bad, it’d be unable to regulate the engine speed anymore. The most common symptom of a bad VVT solenoid or oil control valve is a check engine light on your dashboard. You may also notice issues with the performance, like rough idle, rough acceleration, increased fuel consumption, or low engine power. Here is a more detailed list of the signs of a bad or failing oil control valve to look out for: 1.Apr 1, 2015 · Step 2 – Dirty throttle body. The throttle body itself might be dirty or damaged if the idle is higher than it should be. Typically, a dirty throttle body can cause a rough idle condition as the throttle plate cannot close properly. To fix this, first remove the air intake hose. It attaches directly to the throttle body. Mar 31, 2024 · So, one of the most common symptoms associated with a problematic valve is, irregular idle speed. The valve is programmed, to regulate and maintain the engine idle speed, at a constant rate. So, if the valve fails or has any issues, it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed. A PCV valve is a necessary part of an engine that allows the pressure that builds in the crankcase to be released. When a PCV valve fails, and the pressure is not released, it can cause several symptoms, such as blowing out gaskets or engine misfires. The symptoms will vary and depend on whether the valve is stuck open or closed.Summary. An intake manifold runner control (IMRC) valve is part of the system that opens and closes the flaps inside variable intake manifolds. An illuminated check engine light, engine performance issues, and reduced fuel economy are some common symptoms of a faulty IMRC valve.The most common symptoms of issues with idle control valves are choppy inactive and a check engine light on your dashboard. When your IAC valve fails, you may also notice a variable idle speed or a stopping engine at idle. Here is a more extensive list of symptoms of a faulty or failing idle air control valve (IAC) to watch for: 1.Bad IAC Valve Symptoms: The Telltale Signs of Trouble: Rough Idle: The most common culprit, you'll feel your engine vibrate and chug like a boat hitting choppy waters. High Idle: Stuck open, the IAC valve lets in too much air, causing your engine to rev like a teenager with a new sound system.Here are some solutions when engine valve failure occurs: Identify the symptoms: Common symptoms of failing engine valves include misfires, loss of power, rough idle, excessive oil consumption, and unusual engine noises. If you experience any of these symptoms, it is important to address the issue promptly.A lean condition can occur because of an IAC valve stuck open that allows too much air to enter the intake manifold. This can affect your vehicle’s performance and drivability in various ways. For example, it can cause hesitation, surging, misfires, backfires, loss of power, rough idling, or hard starting.VVT solenoid replacement will involve possibly a diagnostic fee, then labor and the cost of the parts as follows: If your mechanic charges a diagnostic fee, it could range from $65 to $100. Average parts cost will likely be somewhere between $50 and $250. Labor for the VVT replacement could range from $75 to $200.The emission of blue smoke from the exhaust system is one of the most common signs of a bad valve seal. You may also notice a burning oil smell. A bad valve seal may also produce some other symptoms such as misfiring, oil accumulation on the spark plug tip, rough idle, reduced engine power, external oil leaks, or poor acceleration. The most ...Jan 2, 2020 ... The idle is always strange and everything else seems to be fine. I have a code for a bad alternator which I'm replacing soon. But my car really ...A bad idle air control (IAC) valve may be the culprit. If you don’t sort it out quickly, it can lead to costly car engine repairs. But fear not! We’ll identify the most common symptoms of a bad idle air control valve so you can avoid unnecessary repairs.The idle air control valve plays a crucial role in maintaining the engine’s idle speed, and when it malfunctions, it can lead to various problems. One common symptom of a faulty idle air control valve in a Mini is a rough or erratic idle. The engine may idle too high or too low, causing vibrations and instability.Usually in gear at idle or low speed. If I gave it gas, the noise usually went away, and come back at low idle again. It was very annoying. The problem was a bad Idle Air Control (IAC). How The IAC Works: The idle air control valve is located on the intake and is designed to adjust engine air intake at idle which controls the engine idle speed.28. Providence, RI. Dec 29, 2008. #2. sign of a bad iac valve would be stuttering. or at idle it could be idling like ****... i just swapped an IAC on my girls expedition. the truck would idle as if it was cammed out, and soon as you go to drive, it would stall. it COULD also be that your MAF is clogged.. my maf was clogged with a bunch of ...The solenoids may control the vacuum supply to the EGR valve or operate the valve directly. A computer, which is often referred to as the powertrain control module (PCM), operates the solenoids based on input from various sensors. Symptoms of a Bad EGR Valve. When the EGR valve fails, it can cause several noticeable symptoms. Here are the most ...The symptoms of a bad idle air control valve are an illuminated check engine light, stalling, wrong idle speed, and the rare instance of the engine failing to start. You can test the idle air control …The average replacement cost of the idle air control valve is between $110 and $510. Just the components alone may cost you anywhere from $65 to $410. The labor cost may be from $45 to $100 because removing and replacing the old IAC valve does not take long.Feb 13, 2022 · The Fuel Injection Idle Air Control Valve (IACV) is a crucial component in the fuel injection system of a vehicle. Its main function is to regulate the engine’s idle speed by controlling the amount of air that enters the engine when the throttle is closed. However, sometimes the IACV can become stuck, causing various issues with the engine ... What are the Symptoms of a Bad Idle Air Control Valve. This morning my Idle Speed was all over the place. Thanx Reply Like. 03-16-2011, 01:49 PM #2 Kubs. Le Mans Master . Member Since: Oct 2007. Location: Akron Ohio. Posts: 8,880 Likes: 3,100 Received 1,781 Likes on 951 Posts 2023 C5 of the Year Finalist - Modified ...Oct 27, 2009 ... ... signs of leakage. Upvote0. Oct 27, 2009 · #5 ... well you have a idle air control valve, a fast idle control valve. ... My bad idle was several ...Dec 10, 2009 ... Poor idle..if you disconnect it, it will probably stall. The idle control valve words in concert with the throttle potentimeter, ...A lean condition can occur because of an IAC valve stuck open that allows too much air to enter the intake manifold. This can affect your vehicle’s performance and drivability in various ways. For example, it can cause hesitation, surging, misfires, backfires, loss of power, rough idling, or hard starting.Idle speed fluctuations are typical signs of a bad idle air control valve. The idle air control valve is installed to keep the engine’s idle speed consistent. The IAC regulates the engine’s air intake. The machine may occasionally spin at too high or too low a speed due to irregular air intake.Sep 7, 2023 · 7. Misfiring. Misfiring caused by a bad throttle body is due to the fuel/air imbalance allowing unburned fuel to linger in the combustion chamber. It then ignites out of the cycle and/or can pass into the exhaust system, where it can do significant damage to the catalytic converter and other exhaust system components. 8. The idle would fluctuate while driving and the jeep would sputter alot while driving. This thing was driving me nuts. I have already replaced every part under the hood with new including the TPS. The funny thing is I removed the power to the idle air control and now it purrs like a kitten. Of course with the engine light being on.Sometimes you can clean the idle control air valve at the same time you clean the throttle body. You’re already there so it makes sense, and the process is very similar. The cost to have a mechanic completely replace a bad idle control air valve can range from $120 to as much as $550. 7. A Problem with the Transmission’s Torque …MAF sensors are located between the air filter and the throttle body and are responsible for measuring the amount of air entering the engine.. Most vehicles have a hot wire MAF sensor. It has one heated wire and one ambient temperature wire. The microprocessor inside the MAF sensor measures the air entering the engine by maintaining the …One of the most common bad idle air control valve symptoms is an unstable RPMs when the car is idling. It is already given that when the idle air control valve is faulty, the car will not idle properly. You may notice this problem when you’re idling and you see your engine speed fluctuating up and down. You may also be able to hear the engine ...How to Test A Car With Bad Idle Air Control Valve Symptoms. Vacuum leaks and electrical issues, among other factors, could create the illusion of a faulty idle air control valve. It is crucial to …Advertisement The flame of gas range burners should be steady and slightly rounded, with a light-blue tip. The flame should be quiet and should respond to adjustments made at the c...A bad idle control valve can cause a multitude of issues with your car. Check out the Drive’s Garage Guide to identify the signs of a bad idle air control valve.A bad PCV valve can cause significant car issues, manifesting through various symptoms such as reduced fuel efficiency, engine misfires, oil leaks, and an unstable idle. Prompt attention is vital for identifying signs of a failing PCV valve. The replacement cost, including labor, can range from $50 to $200, so it should never be …Bad IAC Valve Symptoms: The Telltale Signs of Trouble: Rough Idle: The most common culprit, you'll feel your engine vibrate and chug like a boat hitting choppy waters. High Idle: Stuck open, the IAC valve lets in too much air, causing your engine to rev like a teenager with a new sound system. Stalling: If the valve lets in too little air, your ...Vehicle Backfires. One more symptom of a bad idle air control valve worth mentioning is that the vehicle is regularly backfiring. This can also be a problem with motorcycle backfiring, something we covered in another article. The problem with the engine backfiring is that it can be a sign of other engine issues. However with a bad IAC valve, this idling will be rough. You will experience heavy vibration (shuddering) when you idle the car. As the valve has gone bad, there will be no/very little air flow to the engine, when you idle the car. Thus, your car will shake, vibrate, and may also make a loud noise while idling. There are plenty of occasions where you might find your car idling. In a long drive through, picking someone up from work, or just sitting in your driveway. If you're idling longer...Here are some solutions when engine valve failure occurs: Identify the symptoms: Common symptoms of failing engine valves include misfires, loss of power, rough idle, excessive oil consumption, and unusual engine noises. If you experience any of these symptoms, it is important to address the issue promptly.Sep 13, 2022 · The 6 idle control valve symptoms are the check engine light turning on, engine stalling, surging while cruising, idle rpm fluctuating, difficulty starting the car, and hesitating to accelerate. If you notice any of these symptoms, you have two solutions. First, you can try cleaning the IAC; if that doesn’t work, replace it. A bad idle control valve can cause a multitude of issues with your car. Check out the Drive’s Garage Guide to identify the signs of a bad idle air control valve.Jun 10, 2023 · 3. Occasional Misfires. As a bad EGR valve worsens the imbalance in the fuel/air mixture results in unburned fuel deposits that can cause misfires. The longer the problem persists the more often misfires will happen, and the more risk you will be at for damaging your engine as well as your exhaust system. 4. Jan 5, 2016 · 1. Rough Idle. One of the first symptoms that a faulty canister purge valve may produce is a rough idle. In this case, you will notice the car running inconsistently while stopped or driving at low speeds. If the canister purge valve fails and sticks open, it will create a vacuum leak that can affect the engine idle speed and quality. A replacement of the OCV will, in that case, require you to replace the entire VVT solenoid, as well. The cost to replace a bad oil control valve is approximately $100 to $600. Breaking it down, you can find oil control valves (including a …Symptom 1: Irregular Idle Speed. A prominent symptom of a bad IAC valve is an irregular idle speed. As the IAC valve determines the engine’s idle speed, any malfunction can lead to erratic engine performance. The idle speed could be either too high or too low, causing several problems.When it comes to fixing low idle RPM issues, one common culprit is a bad idle air control valve. Symptoms may include stalling, irregular idle, or the check engine light with a P0506 code. To fix this issue, you may need to clean or replace the idle air control valve to restore proper engine idle.3. Occasional Misfires. As a bad EGR valve worsens the imbalance in the fuel/air mixture results in unburned fuel deposits that can cause misfires. The longer the problem persists the more often misfires will happen, and the more risk you will be at for damaging your engine as well as your exhaust system. 4.

On fuel-injected vehicles, the idle air control valve attaches to the throttle regulating the airflow and ensuring smooth idling. When the throttle plate closes during idling, the air control valve bypasses the plate injecting …. Walmart supercenter thibodaux products

signs of bad idle control valve

The average replacement cost of the idle air control valve is between $110 and $510. Just the components alone may cost you anywhere from $65 to $410. The labor cost may be from $45 to $100 because removing and replacing the old IAC valve does not take long.The replacement cost of a vapor canister purge valve will be somewhere between $130 to $230 on average. The main expense will be for the part itself, which should cost around $75 to $120. The amount of time a mechanic needs for replacement isn’t too long, so you are only looking at around $50 to $100 for the labor cost.Mar 31, 2024 · So, one of the most common symptoms associated with a problematic valve is, irregular idle speed. The valve is programmed, to regulate and maintain the engine idle speed, at a constant rate. So, if the valve fails or has any issues, it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed. 4.9 Iac problems. 1988 4.9/5spd. Almost sure the iac is bad or what ever sensor tells it what to do is bad. Starts well but no high idle for any prolonged period. idles well cold (just a little miss). When I put any load on it the motor will bog. when it warms up it will accelerate pretty well but it will still miss if I really step on it. Irregular idle speed is one of the most prevalent symptoms of a faulty idle air control valve in a Honda Accord. The idle air control valve regulates and keeps the engine’s idle speed consistent. Therefore, the idling speed might be thrown off if the valve breaks or has problems. As a result, it can cause an exceptionally low or high idle ... Intense vibrations while idling or a rough idle ride might be due to an irregular amount of air flow and are other signs of a malfunctioning IAC valve. At its worst, a bad air valve might cause stalling. If your engine stalls, always visit a mechanic. It could be a sign of several major issues. The idle control valve will trigger the check ...How long do engine valves last? Visit HowStuffWorks to learn how long engine valves last. Advertisement Spend enough time talking to car guys and car girls and eventually you'll pr...Here are some solutions when engine valve failure occurs: Identify the symptoms: Common symptoms of failing engine valves include misfires, loss of power, rough idle, excessive oil consumption, and unusual engine noises. If you experience any of these symptoms, it is important to address the issue promptly.Summary. An intake manifold runner control (IMRC) valve is part of the system that opens and closes the flaps inside variable intake manifolds. An illuminated check engine light, engine performance issues, and reduced fuel economy are some common symptoms of a faulty IMRC valve.The symptoms of a bad idle air control valve are an illuminated check engine light, stalling, wrong idle speed, and the rare instance of the engine failing to start. You can test the idle air control valve with an OEM-level scan tool to determine if the engine part has failed.When it comes to fixing low idle RPM issues, one common culprit is a bad idle air control valve. Symptoms may include stalling, irregular idle, or the check engine light with a P0506 code. To fix this issue, you may need to clean or replace the idle air control valve to restore proper engine idle.Nov 26, 2005 ... Would a dirty or faulty idle air control valve have any effect the firmness of power steering? I am having a problem with really stiff ...1990 300 TE 4matic, 137k. When the car starts and the motor is cold, it idles ok. When up to normal operating temperature, it sounds like it's about to run away with itself.Some of the more common symptoms of a worn-out or broken engine exhaust valve are rough idling, backfiring, reduced power and decreased gas mileage. In certain cases, this problem ....

Popular Topics