Skip the auto shop - Our mechanics make house calls

Q: RPMs jumps at idle, & sometimes stalls when gas applied after a stop at alight or sign and won't restart for a minute or so

asked by on

At stops idle sometimes jumps to1600/1700 apply gas to continue thru it stalls and won't re-start for a minute or so.diagnostic shows no problems w/ dist.,ecm,or pump. have changed filter. dirty tank? heat & cold don't seem to be an issue.

My car has 200000 miles.
My car has an automatic transmission.

A: Hello. A stalling issue like this may take ...

Hello. A stalling issue like this may take some time to figure out. If you suspect your fuel tank is dirty, you may want to drop it and inspect it. However, these symptoms are more likely to be related to the throttle or air intake systems. If the throttle position sensor has failed, the computer will not know how to regulated other engine functions. The throttle body and linkage could also be damaged or contaminated. You will want to check the airflow sensors with a multimeter and make sure they are testing within specifications. A vacuum leak can also cause these issues and should be taken into consideration. When diagnosing an issue like this on an older vehicle, it tends to be a process of elimination. Start with the simplest tests and work your way down the list of possibilities from there.

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: My Camry is starting at 2000 rpm's.

Sounds like there is a vacuum leak that is causing the engine to rev up high. If there is no vacuum leak, then the Idle Air Control Valve could be stuck causing the engine idle to fluctuate on startup. I...

Q: My alternator went out so I replaced it and also had put in new battery. Now it shuts off once I put it in drive.

Hi there. It would seem unusual, after replacing your vehicle alternator and battery, it would stall when put into drive. There is a possibility, the ECM (Engine Control Module) needs to relearn idle speed. Many vehicle engine computers have adaptive...

Q: Ac not blowing cold air what refrigerant do i use

R134A is the correct refrigerant to use. You'll need to have the A/C checked to see if you have a leak or another problem causing your power loss during acceleration. Another possibility is the AC compressor dragging against the belt...

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...
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.