Skip the auto shop - Our mechanics make house calls

Q: Idles high randomly

asked by on

Truck revs up to 3000 rpms stays there for a good while, already replaced tps and idle air control removed and cleaned throttle body

My car has 150000 miles.

A: The only thing that can cause the engine to...

The only thing that can cause the engine to run this high of an idle is a vacuum leak and a misadjusted throttle body.

Try having the engine checked to see where the vacuum leak is. The most common area for a leak is at the throttle body shaft and intake gasket. Also, check the PCV valve hose for any leaks that will introduce extra air into the intake without passing through the idle air valve.

If you need assistance with this, have a qualified technician find the source of the leak and accurately repair your high engine idle.

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・Save up to 30%

Get a quote

What others are asking

Q: My clutch hits the floor was running fine, then I checked reservoir and it's full

Hello, thanks for writing in. The master cylinder is connected to the clutch pedal and the slave cylinder is connected to the release bearing. When the clutch pedal is pushed down, hydraulic fluid flows from the master cylinder to the...

Q: Should I replace or clean the catalytic converter?

Hey there. The Check Engine Light can set if the catalyst efficiency is below threshold. There will be no visible symptoms at all, or change in engine performance, because the recorded "low efficiency" can simply mean that more pollutants are...

Q: Gas filler neck rejects fuel immediately.

Your fuel neck has a restriction in the hose. The filler neck has a big hose on the out side and a smaller hose on the inside. If someone tried to siphon gas from your truck they may have knocked...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.