SW0218 Posted December 30, 2013 Report Share Posted December 30, 2013 i have been dealing with this misfire for a few months now. it all started when i finally fixed my coolant temp. issue, from there i had a clogged cat. I didnt know my cat. was clogged for about a week till my car had loss of power so bad i couldn't get out of first gear. Replaced the cat. for about a week everything was good, then i got the current issue.... Cyl. 5 misfire i have replaced so far: plugs, wires, injecters, EGR, fuel pressure regulator, EVAP purge valve. I moved the coil pack to see if the misfire would move, it did not. Im thinking i might move forward with an intake gasket change? Quote Link to comment Share on other sites More sharing options...
dodgethis Posted December 30, 2013 Report Share Posted December 30, 2013 What car? Quote Link to comment Share on other sites More sharing options...
SW0218 Posted December 30, 2013 Author Report Share Posted December 30, 2013 02 Pontiac Grand Prix 3.8 GT not super charged Quote Link to comment Share on other sites More sharing options...
l67ss Posted December 30, 2013 Report Share Posted December 30, 2013 Uim would be a good bet 02 Pontiac Grand Prix 3.8 GT not super charged Quote Link to comment Share on other sites More sharing options...
Andrew Posted December 30, 2013 Report Share Posted December 30, 2013 white exhaust smoke? how about coolant in oil? how does the #5 plug look? have you removed those pesky metal boot covers yet? Quote Link to comment Share on other sites More sharing options...
95 vert Posted January 3, 2014 Report Share Posted January 3, 2014 I'm with L67SS. Got coolant coming out the throttle body? Quote Link to comment Share on other sites More sharing options...
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