OK I finally figured it out. Basically, the intake manifold had hair line crack about 2/3rds around the lower mounting bracketon the lower right side of the intake manifold. This was not the attachment points on the head, but down low beneith the throttle body on the engine block. The crack was arou...

The issue is not fixed. Driving in this morning I saw the idle A/F ratio go up to 17.5 at a stop light. I did not jump but slowly crept up over 20-30 seconds. Could a PVC valve do this? I have not found a nice clear explanation of how they work. I know that blow by gasses are sucked back into the in...

Hello All, Iam pulling my hair out over this issue. My daughters 2009 1.8l vibe keeps throwing p0171 codes. It got worse over the past cold weeks in the mountains of NC. I have replaced the intake manifold and throttle gaskes with no luck. The car will ide ok, but usung the odb2 reader I notice that...