2006-11-01 05:44:10 · 4 answers · asked by supraman 1 in Cars & Transportation ➔ Maintenance & Repairs
some cars idle funny when their is a sensor problem, the rev'ing you hear could be from the sensor trying to regulate air flow. if you feel your car is not running properly, it would be best to have it checked by your mechanic.
2006-11-01 05:52:19 · answer #1 · answered by vixen0babs 2 · 0⤊ 0⤋
It revs on and off when there's no load on the engine. When you turn the AC on, it puts a small load on the engine and steadies it out.
There's a solenoid that controls idle speed that might be bad. Or the engine might start to stall at the set idle speed, and gets reved up by the computer, just to start over again.
2006-11-01 08:52:32 · answer #2 · answered by Nomadd 7 · 0⤊ 0⤋
does it rev a whole lot? or just a bit? its probably just a mal-adjusted idle speed. and it stops when the air is on because the ac takes power from the engine.
2006-11-01 05:53:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
could be that the AC clutch is cutting in and out, but when you have the AC on the AC clutch stays engaged. Really difficult to be sure as you did not give your make, model and year of car.
2006-11-01 06:24:27 · answer #4 · answered by gary o 7 · 0⤊ 0⤋