too lean CEL, what's a good way to check for exhaust leaks and vacuum?
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too lean CEL, what's a good way to check for exhaust leaks and vacuum?
I put in a new downy header and gibson exhaust...running pretty good, but the check engine light came on with a code on the front 02 sensor -- for a too lean fuel mixture. I guess the first thing i should do is check for exhaust leaks? or a vacuum problem? what's a good way to do that?? any help ??
thanks in advance. mike
thanks in advance. mike
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