misfires and system too lean codes

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misfires and system too lean codes

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04-20-2015, 03:52 PM

ard

Member

Join Date: Mar 2006

Location: Sierra Foothills, California

Posts: 6,765

Quote:

Originally Posted by greggo151

I've had the P0174 & P0171 codes codes for a little while.

You will get razzed for driving around a car with check engine lights and codes. THAT is your problem. If your car was running properly minor issues with octane should not be a problem.

What are you additive and multiplicative fuel trims??

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