What RPM should my car be at when stopped?
In most of today’s cars, an idle speed of 600 to 1000 RPMs is average. If your car is idling rough, though, it won’t feel smooth. The RPMs will jump up and down, for example, or they’ll fall below 600 RPM (or whatever is typical for your vehicle).
Does AC affect idle speed?
The Air Conditioning Shouldn’t Normally Keep the Idle Speed Down. When the AC clutch engages to run the compressor, it places an additional load on the engine. But the car’s computer (PCM) should bring the idle speed back up. If you lose over 200 rpm and idle speed doesn’t rise again, then there’s a problem.
Why does my RPM drop when AC is on?
This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear, turning on AC or engaging the brakes). The computer will then retard (back off) ignition timing slightly to prevent detonation that can damage the engine and decrease performance.
When I turn my AC on my car revs up?
When the engine is put under a load by the AC system, the car’s computer automatically attempts to compensate for that by adjusting the idle. If there is carbon buildup within any part of the system, including the idle air control valve, throttle body, or possibly even the EGR valve, it can cause surging.
Is it normal for rpm to fluctuate with AC on?
It is common to see a small fluctuation in RPM when the AC turns off and on due to the drag on the engine. It should not drop that much though. It sounds like the idle control system is not functioning properly.
Why does my Toyota Corolla have a low idle?
My wife’s 2009 Corolla S has 107,000 miles. Early on it developed a low idle and vibration while stopped at a light. It was idling about 600 rpm after it warmed up. It never stalled but occasionally vibrated.
What causes a Toyota Corolla to stall at a stoplight?
These were just some of the most common ones. A dirty throttle body can lead to stalling in your Corolla. If you let off of the gas coming to a stoplight and it stalls for a second or two and recovers itself, it very well could be a dirty throttle body that is causing the problem.
Why is the AC light flashing on my Toyota?
Why is my Toyota AC light flashing. The AC clutch works with an electro-magnet. The AC clutch coil can burn out, short out or sometimes even become too weak to engage properly. However, those same symptoms can appear if you have a pitted AC clutch relay.
What causes engine rpm to drop at stop light?
engine rpm drops or stalls at stop light on abrupt braking. Hi there. In many cases, the issue you’re talking about is caused by an ignition timing problem; typically related to a damaged crankshaft position sensor or trouble within your ignition system such as the coil or distributor.