What should the idle RPM be on a Mustang?
I found that under 1000 rpm the idle would surge wildly so I unscrewed one of the idle plates screws to raise the rpm. I cannot adjust the idle to lower than 1100 or so or the engine will surge. The surging is especially bad when the system is just at battery voltage under 1000 rpm.
When to replace the idle air control valve?
Start the engine and rev and hold to 1,500 to 2,000 rpm; until no white smoke is coming out of the exhaust pipe. If the idle speed still surges after this, the (IAC) valve is defective and needs to be replaced.
How to troubleshoot an automotive engine high idle?
The troubleshooting procedure for high and low idle conditions are similar, which are included in the following: Step 1 – If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too.
Can a rough idle cause an engine to stall?
A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during its idle state, the car will react by shaking profusely. Another more serious symptom of an issue with the (IAC) is engine stalling.
Why does my car idle at a higher RPM than normal?
Updated January 19, 2019. If your car seems to be revved up to a higher-than-normal RPM while idling, it’s not necessarily a problem. If this problem happens while the engine is cold, it may be part of the engine’s design.
Start the engine and rev and hold to 1,500 to 2,000 rpm; until no white smoke is coming out of the exhaust pipe. If the idle speed still surges after this, the (IAC) valve is defective and needs to be replaced.
Why does my car run at 1200 rpm?
Some cars, especially older cars with carburetors are designed to run at 1200 rpm or so until they are warmed up. And in modern cars, if you are running several accessories, such as the air conditioner or heater, the engine’s onboard computer may be telling it to run at a higher RPM to provide the necessary power.
A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during its idle state, the car will react by shaking profusely. Another more serious symptom of an issue with the (IAC) is engine stalling.