SPONSORED LINKS

1998 Volkswagen Jetta Idling Problem

Tiny
BWILLI1
  • MEMBER
  • 1998 VOLKSWAGEN JETTA
  • 6 CYL
  • FWD
  • MANUAL
  • 20,000 MILES
2.8 V6 98 VW Jetta
The engine will not idle when cold and after it is warm the idle is low. What do you think is the
problem area? I replaced the seal behind the oil cooler on the car and that's all.
Monday, June 1st, 2009 AT 11:23 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Bwilli1,

Thank you for the donation.

When engine is unable to idle at cold start, it could be due to a faulty Engine Coolant Temperature sensor.

When idling speed is low arfter warming up, insufficient air is getting past the throttle valve. The throttle valve could be clogged resulting iin insufficient air getting past. Spray some carb cleaner into the throttle valve and use a rag to scrub it clean.


https://www.2carpros.com/forum/automotive_pictures/192750_ThrottleValve98Jetta01_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_ThrottleValve98Jetta02_1.jpg



Another possibility is vacumn leakages between the Mass Air Flow sensor and it could be due to cracks in the air hose or faulty PCV,

A dirty MAF would also cause the symptoms described. Use a suitable MAF spray cleaner to clean and retry.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, June 1st, 2009 AT 1:59 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links