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gtp missfire

mtz956

New member
my 98gtp missfire a little at full throttle like if gas cuts off . I got a fuel injector cleaner and my car got a bit better, but still missfires . Any suggestions? Thanks
 


it has new sparkplugs autolite ,fuelfilter, tps and i cleaned the throttle body,maf and the idler control sensor. Need to do the sparkplug wire set.
 
im going to do the wire set, can bad coil resistance cause misfire? I have one that i got from junkyard it could be the one. I realy have bad wires hopfelly i can fix it. Misfire happens at high revs around 5000. Thanks.
 
i chased something like this for a while. Might not be your issue but mine happened after a fresh tune up and turned out to be barely visible cracks in the porcelain on my new #4 plug. I think it was the result of not using a cushioned plug socket.
 


ok thanks going to check my plugs. And this happened after i got new autolite 106 plugs, before i was running ngk iridium car felt with more torque.:th_skull:
 
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