Skip the auto shop - Our mechanics make house calls

Q: RPM revs high

asked by on

When we go to start up our car the rpm revs to the 7 (red lines) and then goes down a little and then goes up and down so we checked our fuses and the abs motor relay fuse is gone.. Could that be related.? Or whats wrong with it, why does my car rev up so high

My car has 144 miles.
My car has a manual transmission.

Hi and thanks for contacting YourMechanic. Check the IAC (idle air control valve) to the engine. This will cause the RPM’s to fluctuate up and down to a dramatic amount. Look at the wiring to the IAC and make sure that there is no corrosion, loose wires, or any burnt pins. If the harness seems to be good, then I recommend replacing the IAC with an OEM part. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, to pinpoint the correct repair for the high RPMs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: engine sputtering in the rain and having a harder time starting in the cold recently

Consistent occurrence of poor operation during periods of high humidity is a clear sign of current leakage in the ignition system. Such leakage can occur as moisture provides an unintended path to ground on the high tension spark plug wires...

Q: I have an 03 accura integra looking for a car the engine will fit.

The engine will fit in any Honda Civic of the years 1988 to 2000 and any Honda Integra from the years 1990 to 2003. You can modify the engine to fit a Honda Civic from 1984 to 1987 and a...

Q: car won't start after sitting for three weeks

In all probability the battery is dead. The reason the horn blared during the jump start attempt is the "restoration of power" is interpreted by the car's security system computer as an attempt to "steal" the car. That's just the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...