I am having an issue with misfires on a 1999 GP GTP.
The parameters in which it happens (intermittent):
-approx. 40-50 mph
-cruising
When it occurs:
-when you gun it
Basically if you are crusing at about 40-50mph, and then you gun it, it will misfire continuously for about 6-7 seconds if it is held down, but if you let go, give it a sec, and step back on it, it seems alright, but kind of laggy.
I first thought the tranny wasn't downshifting, but now that it has occured more, I notice it definitely is misfires.
I changed spark plugs just recently (within past month n half), so it should not be them. It isn't a highly modded car (yet) so I don't think it is a mod I have done either!
Any suggestions will help!
Thanks
