p0172 and p0175
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Joined: Jan 2008
Posts: 31
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From: Modesto CA
p0172 and p0175 whats up guys i have a 2002 camaro ss 35th anniversary edition it has a K&N fipk intake a comp 212/218 522/529 cam, edelbrock shortie headers, slp exhaust and i also tuned it well lately my cars been running like **** I scanned for codes and po172 and p0175 came up my cars now stumbles on its face when i accelerate when i try to race so I stopped running it hard till I fixed it I put a new fuel filter in it also took it to chevy and they changed a 02 sensor its still acting the same fuel pressure is fine could it be a injector do I need bigger ones?
My car is doing a similar thing. It will initially hesitate, then it will go. I just had my tune changed because my long trim fuel was over 25 all the time setting a P0171 and P0174 code. I've noticed that my long trims are in the negative now, meaning that the computer has to lean out the mixture. I'm going to go back to the tuner, and it should be done this time. I would check and change the tune.
maf frequency needs to be readjusted for the cold air intake. Then VE table needs to be modified for the cam. pumping effeciency changes from the cam. You may be rich up top. What does your wideband say when it chokes out? If you go wot what are your fuel trims? Since those are both rich codes per bank I am assuming it is a problem with your tune. Has this just started happening or has it been since a modification? weather changes maybe making the problem worse?
