misfire

[k.sidlosky]

my car has a misfire it only happens when you go into wide open throttle and also around 5500 rpms I checked the ignition system and I also added a fuel cleaner to a tank of gas also putting 91 octane in which is like mid grade any one have any ideas it runs fine some times and at other times it has a misfire like crazy any ideas let me know

[darkhorse737]

Originally Posted by k.sidlosky

my car has a misfire it only happens when you go into wide open throttle and also around 5500 rpms I checked the ignition system and I also added a fuel cleaner to a tank of gas also putting 91 octane in which is like mid grade any one have any ideas it runs fine some times and at other times it has a misfire like crazy any ideas let me know

when was ur last tune-up? what plugs are you using?

[k.sidlosky]

the plugs are new i'll check the gap on them and I just had a tune up but before I had the oil changed the car was misfiring and right after it ran wonderfully I checked the vacum and no valves are sticking, its nothing with the ignittion(new cap, rotor, and plugs) the wires are all good I have yet to check fuel but the filter is new also the only other thing it could be is the air i have a feeling it could be the tps cause when i unplug it the car runs the same and the car needs that to adjust the fuek curve so I'll look into testing it tomorow at work I know it isn't the maf sensor cause i unplug that and the car shuts off my old jetta used to do that

[k.sidlosky]

so it turns out the wires where bad I avoided checking them in the begining because I know how expensive they are well I bought them today and had them on in like twenty minutes now my car runs like a beast finally no more waiting for good days to drive