I was drive my 01 GP and I stepped on it hard and got up to 70 on a hill and the check engine light started flashing but stopped when I got out of the gas.Then later I got up to 100 and it started to flash. Why is it doing that?
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12-13-2011
I was drive my 01 GP and I stepped on it hard and got up to 70 on a hill and the check engine light started flashing but stopped when I got out of the gas.Then later I got up to 100 and it started to flash. Why is it doing that?
12-13-2011
Best take that car somewhere and get it scanned. When the dummy light flashes your in limp home mode. Means 'please dont drive me I'm dieing!' and you prob shouldnt until you get the issue taken care of.
OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
12-13-2011
It went out after a few seconds.
12-13-2011
Best get it scanned asap. The codes pulled off the scanner will give you a pretty good idea where to find the prob and how to fix it.
OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
12-13-2011
Thanks
12-13-2011
You have a misfire, thats why its flashing.
Pull all the spark plugs and make sure none of them are smashed or broken, then look at your wires and make sure none are broken.
If you dont think the plugs have been changed in a while, maybe you should just replace them all.
12-13-2011
Per the FSM the check engine light flashes when a potential catalyst damaging condition is present.
This typically means you have a misfire. This can be a weak coil, bad wire, bad plug or worse.
12-13-2011
So would it only be misfiring only when im running it hard? How much is a coil?
12-13-2011
Correct, I've had coils go out while running hard. I've also seen plug gap cause issues when running hard etc. So let's diagnose before shotgunning parts.
Read codes and see if you have one cylinder misfire showing up.
12-13-2011
Ok thanks!!
12-13-2011
Could be bad injector orings.
OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
12-13-2011
I'm running STP injector cleaner when it happend and im still on that tank of gas. would that affect it. I did not have it in when I was going 100 and it happened.
12-13-2011
i used to have this problem then i changed my 212k mile old plug wires and problem solved they would only short out under load never normal driving
12-13-2011
Please explain.Originally Posted by SDGTP99
12-13-2011
Sry I'm thinking of a different problem.
OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
12-16-2011
1,3,5 where misfiring so time for a tune up. Thanks for the help
12-23-2011
Finally got time to do a tuneup and the back 3 plugs where all different brands and bad lol Its all good now thanks for the help!
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