SPONSORED LINKS

1994 GMC Sonoma Idles Rough

Tiny
RKANIA
  • MEMBER
  • 1994 GMC SONOMA
I have a 1994 GMC Sonoma with 146,000 miles. It idles very rough, does not stall, & failed the idle portion of the smog test. I had this issue in 2004 & they replaced the EGR valve, fuel delivery & return line, & fuel injector spyder. Could it need the same repairs again? This would be the 4th EGR valvue. Is the vehicle worth repairing? Thanks for your help.
SPONSORED LINKS
Monday, June 25th, 2007 AT 10:57 AM

1 Reply

Tiny
ANDYDUMAIS
  • MEMBER
  • 3 POSTS
EGR valve has piece of carbon stuck in it preventing it from closing.

Remove EGR valve and clean it. It should then be ok.

Change garage if they are replacing EGR valves unnecessarily (or saying they are changing it but only cleaning it).

To prevent problem in the future, install gasket with screen to prevent carbon particles from entering valve.

Excessive running of engine with EGR stuck open will cause exhaust to dirty intake manifold including air filter. Air filter should be checked/replaced after cleaniing EGR valve.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Tuesday, March 18th, 2008 AT 8:10 AM

Please login or register to post a reply.

Related Engine Idle Rough Content

Rough Engine Idle
GUIDE
Rough Engine Idle
A rough engine idle condition is a common issue that many drivers face often indicating underlying problems within the engine, fuel or ignition system. We have created this...
VIEW MORE

Sponsored links