Having a problem idling?

Tiny
CJACKSON123
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
  • V8
  • FWD
  • AUTOMATIC
  • 22,500 MILES
I have a 98 grand prix gtp it is having a problem idling. If you hold the gas down it run, when you let off it will stall. You can drive it if you hold the gas pedal down a little and put it in gear.
Do you
have the same problem?
Yes
No
Wednesday, October 7th, 2009 AT 5:16 PM

1 Reply

Tiny
SQM
  • EXPERT
Hello,

This issue could be due to a dirty mass air flow (MAF) sensor. It can also be triggered by a dirty idle air control valve.
Over time air particles will stick to the MAF sensor and it won't be able to monitor the airflow correctly. This can make the idle rough or not idle at all.
This sensor can be cleaned out and many cases the cleaning out of the sensor will fix the idling issue.
The MAF is located on the throttle body (see diagram).

https://www.2carpros.com/articles/how-a-mass-air-flow-sensor-works-maf
https://www.2carpros.com/articles/mass-air-flow-service

When a IAC gets dirty due to trapped air particles in the valve, it will have reduced air flow, which can impact the way the engine idles. This too can be serviced by cleaning out the dirt buildup.
The IAC is located on the throttle body (see diagram)

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works
https://www.2carpros.com/articles/idle-air-control-valve-service

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
Was this
answer
helpful?
Yes
No
Wednesday, September 22nd, 2021 AT 10:59 AM

Please login or register to post a reply.

Sponsored links