Q: Idle high at start up then drops down slowly

asked by on

When starting truck for first time of the day idle reaches 2000 rpm and slowly drops down to normal after a minute or two. Is this normal or an underlying issue that needs attention?
My car has a manual transmission.

Hi there. Typically when an engine starts up for the first time, the engine’s RPM speed will be increased slightly to allow the motor and other operating systems to warm up to operating temperature sooner. In some cases, a vacuum leak or faulty idle control valve will cause the RPM to be accelerated for longer periods of time. However, if the RPM goes down after a few minutes, it should be fine.

Was this answer helpful?
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. Idle high at start up then drops down slowly

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: front left making a rumble. doesnt do it when slightly turning left

It is likely that the left front wheel bearing has failed. When you swerve to the left on a ramp, what you doing is transferring some of the weight of the car from the left to the right. The transference...

Q: Crank but want start. Key stays in start position and continues to try and start. What could this be?

It sounds like you may have two different problems. The first is key sticks in start position can be a defective ignition switch internal spring or the key lock linkage is binding. You may need to remove electrical ignition switch...

Q: Loud noise and tire locking up while driving. The left ball joint control arm is bad.

Hi there. Knowing the lower ball joint is bad leads me to believe that the really loud noise and wheel lock-up may be related. A bad lower ball joint typically will cause the vehicle to track (veer) towards any groove...

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...
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.
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.