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.

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
  1. Home
  2. Questions
  3. Idles high randomly

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: I have a 88 v20 Chevy 4x4 w/3 gears + granny . when I try to shift my shifter locks up n my clutch won't move n my brake pedal

Both the brake and clutch systems will have to be inspected. If you have power brakes, once the "reserve" is exhausted, when the engine is off, brake effort will be really high so you might be experiencing that. With regard...

Q: Radiator is no good, went through a few

The computer controlled fan on these vehicles comes on and goes off at a certain temperature and is controlled by the engine control module. Ford has come out with a Technical Service Bulletin (TSB) 09-8-1, dated 5/8/2009. The TSB calls...

Q: Dead battery

This depends on the engine you have in your Ford F250. As you may know, this truck had an option available with a diesel engine which generally would require much more cranking power than the 5.3L motor that would have...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.