Your idle air control valve should not affect your acceleration. As soon as you step on the gas , the idle part of your engine should not be operating. If your car cuts out or stumbles, i would suspect a problem with the TPS ( throttle position sensor.)
first check for battery voltage to the valve by probing the wires of the electrical connector with a volt-meter it should be about 10.5 volts if not it's probably bad.next remove the valve and check the pintle inside the valve ports for excessive carbon deposits clean the valve ports and pintle with carburetor cleaner and replace the valve if idle does not improve replace the isc valve with a new one.
By hooking up a vacuum gauge could help indentify bad valve. the needle of the gauge would bounce erractically during idle.
If the 1998 Olds Achieva will not rev over 2500 rpm there may be an issue with the idle control valve. A bad or unplugged valve will not let the car accelerate over 2500 RPM.
Poor performance, poor economy, rough idle, lean burn causing valve or piston problems...
If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate.
1990 Honda accord ex how would you know if idle air control valve is bad?
whete code (Test Server)
Yes they can. It can also be a vacuum leak, or defective idle control valve.
A bad IAC (Idle air control valve) or a vacuum leak or both.
Once your out of idle the idle air control valve isn't used so it shouldn't affect the operation of the car once your moving
The IAC (Idle air control) valve is bad and needs to be replaced. Its about $200 parts and labor.
It may be a bad Idle Air Control Valve .
code 14: Idle air control valve or bad ECM
Most likely a bad Idle Air Control valve. Could also be a vacuum leak.
If the IAC was bad the car wouldn't run at idle or it would die when a load was put upon it.
Most newer fuel injected vehicles have a idle control valve or idle speed motor or a variation of one. A idle speed motor controls the idle speed but when they are defective, they can allow a lean mixture which can cause a very rough idle. WRONG! A malfunctioning iac will NOT effect your fuel mixture. Your misfire problem is likely one of five things. Bad injector, bad spark plug, bad spark plug wire, bad egr, or bad egr control valve. If the problem is ignition related it usually gets worse as engine load is increased. A dirty injector can cause issues across the load range. A bad egr or egr control valve will be worse at low engine loads. The control valve is strapped on the side of the intake tube from the airfilter box to the throttle body. Find the hose going from that to the egr valve itself and unhook it. If the idle improves, you have a bad egr control valve. If idle does not improve, chech the other items (egr valve, plugs, wires, injectors).
yes it will , also check all vaccum lines.