Why does my car revs go up and down?
The idle is controlled by the idle air control valve and if it cannot keep the engine idling it will keep trying to rev the engine up to compensate. A vacuum leak, sensor that has failed, or an EGR system malfunction could potentially be the cause of the erratic engine you’re experiencing.
When does a car over revve but not gaining speed?
When I’m driving along the dual carriage way it takes ages to pick up speed yet the car is over revving. Cars are always over taking me, it’s embarrassing. I’m on the dual carriage way barely reaching 30mph at times. When it finally reaches 40 I up the gear to 4th. Thinking about it now the over revving seems to happen when i change gear.
Why is revving the engine bad for your car?
Revving out the engine in your car can be bad for the engine if it’s internal temperature is still low. On a cold start, the internals of an engine hasn’t had a chance to properly warm up and the engine oil is still cold which means it won’t flow as well.
What happens if you rev your engine before warming up?
If you rev your engine before it’s been warmed up the oil may not be able to properly lubricate the engine which means more wear and tear on the internals. In general, the more wear on the internals of an engine the shorter the life of that engine, but revving the engine in your car is fine as long as it’s been properly warmed up.
Why does my car rev up when idling?
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.
When I’m driving along the dual carriage way it takes ages to pick up speed yet the car is over revving. Cars are always over taking me, it’s embarrassing. I’m on the dual carriage way barely reaching 30mph at times. When it finally reaches 40 I up the gear to 4th. Thinking about it now the over revving seems to happen when i change gear.
When do you start the car, the engine revs?
Car engine revs way up immediately upon starting engine. Q: Car engine revs way up immediately upon starting engine. When starting the engine, it sounds like you have your foot pressed to the floor on the gas pedal as soon as you start it, without even having your foot on the gas.
Why is my car revving at high RPMs?
But, to answer your question… No, a clogged fuel filter would not explain an engine that is revving at high RPMs without the car moving at an appropriate speed. The most likely explanation would be a failing transmission if it is of the automatic variety, or a slipping clutch if it has a manual transmission.
Why does my car Rev high with no acceleration?
Also, the RPMs rev very high from about 2 to sometimes 5,000 (all with no acceleration). This seems to happen randomly, regardless of how fast I am driving or the road conditions. Today, the check engine light came on as well when it was happening. Any ideas? Thanks! Beadsandbeads July 5, 2016, 10:45pm #2 Check the transmission fluid.