Codes P0171 & P0174 on 2002 Chevrolet Tahoe

When it is cold

by in Wake Forest, NC on February 01, 2013
1 answer 5 comments
ANSWER by on February 01, 2013
What engine?????
COMMENT by on February 02, 2013
4.8
COMMENT by on February 02, 2013
First suspect is vacuum leak at intake manifold. Not the only possibility though. Prob. need to get a mechanic to check it out.
COMMENT by on February 02, 2013
I work part time at a shop. can it be check with carb spray
COMMENT by on February 02, 2013
Cool, now we can talk motors! Yes that will work, check all the other stuff also like MAF may need cleaning, upstream O2's Use a scanner, you will find it!
COMMENT by on February 02, 2013
thanks
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