Skip the auto shop - Our mechanics make house calls

Q: Car revs high

asked by on

My tiburon will rev at about 2000 rpm While driving and get no acceleration while doing so. It generally happens after the car has been drivien for about 10 minutes. Almost feels like it is gasping for air or fuel. If I let off the acceleration it will still rev high. No codes on ecm or computer. Had a previous code for brake light switch and evap valve. Replaced them both and it went away but now is back to a high rev again

My car has 113000 miles.
My car has an automatic transmission.

A: Air leaks into the intake system (a loose h...

Air leaks into the intake system (a loose hose, or the EVAP valve as you have already experienced). If there are no codes, even transient codes which may not set the Check Engine Light, the problem could be a loose hose, intake gasket or coupling, or other intake passage component which may not be directly monitored by engine management (i.e. power brake booster vacuum hose for example). If you need help having this checked, I would recommend having a certified professional from YourMechanic diagnose the high idle speed so that this can be repaired properly.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Replaced part after check engine light was diagnosed, but the check engine light came back on after a few days.

Hi there. The code P0010 is in reference of the Camshaft Position Sensor on your engine. Check the harness to the sensor and see if its hooked up properly. Then check the sensor for resistance as the engine is cranked...

Q: Engine choking, ABS and ASR lights illuminated - 1993 Mercedes-Benz 300SE

Hello. If all of these occurred at the same time then the battery and alternator need to be checked. If the alternator is not charging or if the battery is bad then this will occur. If that is fine then...

Q: Car doesn't run right - 2005 Chevrolet Impala

Hello and thank you for contacting YourMechanic. You will need the check the idle air control valve (IAC). It is located just under the throttle body where the throttle plate is. Unplug the harness and check the plug for any...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.