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Intake, Header, HFC, CBE = Too Lean?

Originally Posted by Nitex Well it seems this thread may have answered my question that no one responded to on my own thread. Seems i threw a lean code P0171,

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Old 03-26-2010, 05:54 PM   #11 (permalink)
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Quote:
Originally Posted by Nitex View Post
Well it seems this thread may have answered my question that no one responded to on my own thread.

Seems i threw a lean code P0171, unless this is an 02 issue im wondering if i am indeed running to lean with out a tune. However after clearing the CEL my idle rpm returned to 600 from 1k.

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Stillen CBE, Gen'3s and Berk HFC
Well from reading this: Stillen CBE, Gen'3s and Berk HFC

It is a safe bet to say you are running too lean. Now if this is what caused the code, I cannot guarantee that. If one of the O2 sensors was damaged you would probably throw a different code, so we can rule that one out.

I would say it is time to get your car on a dyno and find out what that A/F is doing. If it is lean, you will need a tune. If you cannot afford a tune then put the stock intakes back on the car for the time being and I bet ten to one your A/F will go back to where it needs to be...

Tony
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