I have a 99 S-10 4.3 liter v-6 that runs really rough while cold, after it sits for about 30 minutes from the initial start up it runs fine, can anyone tell me what senor i need to replace or whats wrong?

Asked by Jan 19, 2014 at 10:58 AM

Question type: General

4 Answers


is the CEL on?

There are no codes or check engine light on.


Vacuum leak, Injector not sealing off letting gas into the cylinder, Start of a blown head gasket leaking antifreeze into cylinder and sealing off as it warms up.

Thank you tuff4x4, I will check for vacuum leaks and injectors leaking. I have never over heated the motor and it doesn't use any antifreeze, but I will keep that in mind.

Your Answer

Add photo

Related Questions


Looking for a Used Chevrolet in your area?

CarGurus has 772,945 nationwide Chevrolet listings starting at $495.


Search Chevrolet Questions

Chevrolet Experts

#1 Tom Demyan
Tom Demyan
Reputation 22,840
#2 Rowefast
Reputation 16,380
#3 John Saffrahn
John Saffrahn
Reputation 15,880
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.