Quote:
Originally Posted by sdrgac
spark is hot. but the injector pulse is a little weak. why would the motor run more smoothly when you plug the MAP sensor vacuum line? it idles better when it is plugged. could these two items be related?
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May be a bad MAF sensor.
What is voltage reading on MAF at idle and 2K rpm?
Check for codes and then clear codes and recheck for any codes coming back.
Post back any codes you get befor and after code clear.