Close
It has a miss at idle and driving.Check engine light on. code po 300 and po 307
1999 Chevrolet Tahoe

It has a miss at idle and driving.Check engine light on. code po 300 and po 307

(1999 Chevrolet Tahoe)
Number 7 cylinder plug was real black and burnt. rest were tan. And the cap and rotor was real corroded. Changed plugs cap and rotor. Cleared computer. Still got same miss and check engine light came back on with same codes. I can't believe the one injector for all 8 cylinders. Would make just number 7 misfire. And the plug wires were new last year. AC delco. Maybe a compression check on that cylinder.
in Menifee, CA on March 26, 2013
Ask a Question
1 answer & 1 comment
Popular Answer
of Greg's Orange Auto on March 26, 2013
yes compression ck but sounds like wires to me again. are they burn"t at all
Sign in to reply
on March 26, 2013
Don't look burn't! I forgot to add. The spark is orange. Not blue or white. Going to check coil!
Check Engine Light Diagnosis
$88 - $111 Learn More
of Greg's Orange Auto on March 26, 2013
yes compression ck but sounds like wires to me again. are they burn"t at all
Sign in to reply
on March 26, 2013
Don't look burn't! I forgot to add. The spark is orange. Not blue or white. Going to check coil!

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Happens at different times while driving
in the morining when i start the tahoe some times oil pressure comes up & some time it doesn't. whe...