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How Long Does a Power Steering Control Valve Last?
Power steering is a wonderful thing – it makes maneuvering your car much simpler than if you were stuck with manual steering. Fluid-based power steering systems are the most common...
How Long Does a Proportioning / Combination Valve Last?
Modern brake systems are far more advanced than they were even a few years ago. Today, most cars come with front disc and rear drum brakes (although many also come...
How Long Does a Vacuum Brake Booster Check Valve Last?
The braking system on your car requires a lot of pressure. The vacuum booster is one of the main sources of this pressure. This booster will take the pressure that...
How Long Does a Valve Cover Gasket Last?
Among the most important parts of any engine is the oil that is contained within it. There are a variety of moving parts that depend on the oil for lubrication. The...
How Long Does a PCV Valve Hose Last?
Your car’s engine requires both air and gasoline in order to operate. During the combustion process, it also creates gases. These gases contain traces of gasoline and can be re-burned by injecting...
How Long Does a Vent Oil Separator Last?
The engine in your car can only run when the right number of controlled explosions are performed. During the explosions, there are a number of gases that are produced that will...
How Long Does a Positive Crankcase Ventilation (PCV) Valve Last?
Your car’s engine operates by mixing air with fuel and then burning it. This obviously creates waste gases. Most of those gases are routed out of the engine, through...
5 Commonly Overlooked Vehicle Maintenance Items
Brake fluid, auto transmission fluid, and coolant flushes, as well as cabin filter changes and valve adjustments, are all important services.
How to Replace an Air Pump Check Valve
The air pump check valve allows air into the exhaust system. It also prevents exhaust gases from reentering the system during a backfire or failure.
How to Clean an EGR Valve
The EGR valve is the heart of the emissions system on an engine. EGR is an acronym for Exhaust Gas Recirculation, and that is exactly what it does. This wonderful...
How to Change a Radiator Valve
A radiator valve allows coolant into the radiator in order to cool off the engine once the coolant has reached a certain temperature.
How to Inspect Valve Clearance Adjustment
The term “valve adjustment” is an oxymoron. What is actually being adjusted is the clearance between the linkage of the camshaft and...
How to Replace a Positive Crankcase Ventilation (PCV) Valve
A positive crankcase ventilation valve improves emissions in modern engines. Signs of PCV valve failure include oil leaks and poor engine performance.
How to Troubleshoot and Replace a Leaking Valve Cover Gasket
Valve cover gasket leaks usually start when not much oil leaves the engine. It should be repaired before it causes serious damage and costly repairs.
How to Replace a Car Combination Valve
The combination valve balances your brake system. If broken, it should be replaced to ensure a safe driving experience.
How to Replace a Vacuum Brake Booster Check Valve
Brakes are assisted by the vacuum brake booster check valve that fails when the brake pedal is hard to press, feels spongy, or does not work at all.
How to Replace a Power Steering Control Valve
Some common signs of a failing power steering control valve include a power steering fluid leak or the smell of burning power steering fluid.
How to Replace a Proportioning Valve
The brakes on the rear wheels may lock up when the brake is applied especially when surfaces are wet if the proportioning valve is failing.
How to Replace Your Car Idle Air Control Valve
The IAC valve, or idle air control valve, dictates your vehicle’s idle. A faulty valve can lead to rough idling and stalling, among other problems.

Related questions

car shaking/vibrating when idle
Hello. This sounds like potentially a failing idle air control valve or potentially a misfire. The idle air control valve regulates the air intake into the engine as it is mixed with fuel prior to being injected into the engine....
Can gasket cover leak. Can this make the car struggle or jump/ jerk when driving?
Hello. Yes, if the valve cover gasket is leaking, oil can leak down into the recesses where the spark plugs live, soak the rubber boots from the coil, and cause the plugs to misfire. If severe, considerable misfiring and stalling...
Timing belt broke.
Hi, thanks for writing in. This engine is listed as an interference motor. This means the engine is likely to bend the valves if the timing belt breaks. The only way to verify if the valves are bent is to...
Can a bad canister purge valve cause my car to shake/vibrate under the hood when i brake or make constant stops?
First thing to check is the problem codes that are setting your Check Engine light on. While it is true that fumes from the vapor canister are pulled into the engine during "coast down" when there is high vacuum in...
I was told to change my valve gasket and valve cover. Should I?
Hi, thanks for writing in. Five years is a bit on the early side to have a leaking valve cover gasket. The labor time is 3 hours to replace that gasket and YourMechanic typically charges around $400 (part and labor)...
Cracked valve cover
Good question and I hope I can help you fix your issue. Your car may not be starting due to your valve cover being cracked. It may also not be holding enough pressure in the engine to start. However, we...
Car won't start after doing valve cover job.
Hi there. From the description you have provided, something was reassembled incorrectly. Not replacing the upper intake (plenum) gaskets should not have caused the vehicle's no start condition. Once that you have the plenum removed, carefully inspect all the components...
2002 s430 mb, code p0444,how many purge control valves and location?
There are 2 purge control valves. The rear valve is located in the rear wheel well (driver side) behind the wheel well panel. The front valve is located next to the ABS unit (driver side) in the engine compartment. ...
I have p0203 dtc injector circuit malfunction
Hello. If this occurred right after the replacement then I would look for a pinched wire. It is common for there to be a wire that is pinched or loose or a bad connection. If everything is fine it may...
Bad idle air control valve
Hi there. I would need to know what the codes are to know if they are related. The idle control valve failing can cause other codes to come up, but there are other problems and codes that can come up...
What causes the engine to run rough and the engine to die when the accelerator is pressed?
Hello. You have covered most of the common parts that fail with the exception of the idle air control valve/module. This is a unit that works similarly to the mass air flow sensor as it regulates the air intake into...
I cleaned the EGR valve but I'm not sure if it is working now
Yes, if you pressed on the diaphragm and it stalled the engine that means that exhaust gases were flowing through the EGR valve as intended. A good way to test the EGR valve in its entirety is to use a...
The motor is sucking a lot of air from the plastic valve cover
The pcv valve may be stuck open or fell part inside causing excessive suction in the engine and high idles. Have the crankcase ventilation system checked for problems.
Is there any relation between the sparks plugs not changed and affecting the valve cover
Hello. The spark plugs should not have any direct relationship to the valve covers. If there is a leak going on in the valve covers then the leaking oil can affect the spark plugs and cause a misfire, but as...
Car not running after throttle body with IAC valve replacement
Hi, thanks for writing in. I would recommend retracing your steps. You are definitely on the right track. It sounds like you did a good amount of work to your car, and it is likely that something may been skipped...
Car keeps dying
There are usually two different issues that cause the engine to stall or reduce RPM in situations like this. The first thing I'd look at is the idle control valve or sensors that monitor the fuel system. The second item...
My car want accelerate and my engine light is constantly blinking on and off
Hello. A misfire under load is typically caused by a problem in the secondary ignition system (i.e. plugs, wires, coil pack). This will also cause your Check Engine Light to flash. The powertrain control module (PCM) directly controls coil operation,...
Timing belt broke
I believe that you are right: your drive belt is broken. Unfortunately, this happens to everyone at some point. The best course of action is just to replace the belt. I don't believe anything happened to any internal engine parts...
Hi there. There are a lot of things that can cause this. I would need to know when it turns off and what size engine you have to be accurate on my assessment of the issue. If the van is...
I have a problem with the idle of the
This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected...

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