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Discussion Starter #1
I just installed my FC 3 piece underdrive pulley set. They work great but my check engine light keeps coming on. I disconnected the battery so my computer reset 2 time and the light come on after 20 so miles. I don’t know what to do about it. I installed them like it said on the instructions. Should I find out what is going on or keep driving and not worry about it and find out latter.
thanks
 

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your o2 sensor is out...usually 02 sensors throw a CEL after 20 miles...check all the connections first...but to be 100% take it to autozone and have them pull the codes.
 

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egr valuve. how many miles you got?
 

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Discussion Starter #4
like 600
 
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