1999 Pontiac Grand Prix "changed plug missfireing" Questions

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Question about Pontiac Grand Prix

1 Answer

...CHANGED WIRE AND PLUG AND COIL SERVICE LIGHT STILL ON AND FLASHES INTAKE MANIFOLD REPLACED A COUPLE YEARS AGO 10O K ON ENGINE take plug,wire,coil and swap with another cylinder if still #5 missing ...

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Question about Pontiac Grand Prix

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...CHANGED THE SPARK PLUGS AND WIRES. I ALSO HAD TO CHANGE THE FUEL PUMP THE GAS COMPRESSION WAS AT 18 AND THAT WAS AFTER TURNING IT ON 15 TIMES, SO IT IS STILL MISSFIREING AND NOW IT EVEN BACKFIRES AND ...

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Question about Pontiac Grand Prix

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...changed the front three plugs on my car (246) forgot to make note of the firing order and missfired a buncha times trying to get the right order. I'm thinkin i messed somethin up with all those ...

Question about Pontiac Grand Prix

1 Answer

Hi all, my 99 sub.350,300k,missfire #2 Hi all, my 99 sub.350,300k,with regular oil changes has a intermitent missfire on cyl.2 chanced plugs wires rotor,cap [for 1st time on engine]still ...

Question about Pontiac Grand Prix

2 Answers

what cani do to fix the missfire How often does it misfire? A slip in a timing belt/chain can cause missfires. Bad spark plugs as well. it's called a tune-up. change spark plugs, spark plug wires, cap

Question about Pontiac Grand Prix

1 Answer

random missfires 2000 blazer with csefi, i replaced the fuel pressure regutator because of hard starts, now it starts but has random missfires, plug wires are correct and did not missfire before ...

missfire on 1 and 6 cyclinder running fine this morining then engine starts skipping looked at OBDII tool had missfire codes change cylinder 1 and 6 coils and all the spark plugs when the last time ...

2000 toyota echo has multiple Missfire code.I have change plugs and added fuel injection cleaner to the gas. ck engine lite still on has multiple Missfire code.I have change plugs and added fuel ...

be that fast ... i jusht changed my spark plugs .... can it be something else? Try and change ur plug wires. Also if the person didnt check the gap when putting in the plugs could also cause a misfire

Question about Pontiac Grand Prix

1 Answer

...changed the spark plug and wires to a new one. I can't find any vaccuum leaks. Any answers? I've had enough with this truck. do you have a seperate coil for each spark plug check ur coil for number 6 ...

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