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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 08-30-2008, 12:14 PM   #1 (permalink)
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misfire

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
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Old 08-30-2008, 02:53 PM   #2 (permalink)
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Originally Posted by k.sidlosky View Post
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?
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Old 08-31-2008, 07:48 PM   #3 (permalink)
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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
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Old 09-10-2008, 06:06 PM   #4 (permalink)
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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
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