PO171 Bank1 and 2 running lean

[Chris Joyce]

I already had my check engine light come on a few weeks ago, and it ended up being the gas cap. Now PO171 bank 1&2 running lean..I searched and found the infamous cracked elbow, IAC, Mass flow controller...Can you guys give me some direction please?

 

[EddieS'04]

Is your trac a '01 job1? If so, some have had to change the intake O-rings.

 

[Chris Joyce]

job1

 

[Coleman Brumley]

On the job1, it's the intake manifold gaskets. Cheap part, but expensive fix due to the amount of labor.



Do a search in the forum, and you should see my posts about having this experience.

 

[EddieS'04]

Use a unlit propane torch, or carbcleaner, or a squirt bottle of water. Go around all upper plenum mounts and lower intake mounts. See if you get a change in motor speed. With motor idling. Same with all vacuum connections also.

 

[Chris Joyce]

Coleman, expensive meaning? rough estimate

 

[Bo Loo]

I'm showing about $200-$300 in my zip code.



http://repairpal.com/

 

[Coleman Brumley]

It was about $250 at my mechanic. The dealership quoted way more than that.