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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 04-30-2009, 10:03 AM   #1 (permalink)
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90 535i Rough idle & acceleration problems

Hey guys, I have 90 535i and recently it has started running rough it barely idles and when u go to push the gas peddle it dies, I recently put a chip on it and I'm wondering if thats the cause of the problem. I have also changed the maf and that didn't change anything.
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Old 04-30-2009, 10:18 AM   #2 (permalink)
OMFG another one!?
 
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Maybe a check of the ignition and fuel systems?
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Old 04-30-2009, 10:42 AM   #3 (permalink)
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Could have a vacuum leak check out all the vacuum/ air intake hoses.
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Old 04-30-2009, 11:39 AM   #4 (permalink)
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It is also throw out a check control code i have tried searching for it but can't find what it is.
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Old 04-30-2009, 04:55 PM   #5 (permalink)
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535i

Nice car, that. Try putting the old chip back in and check things out-I once had an 88 735i with the same engine, put in a Bavarian Autosport Chip and it ran like shit. I would also change the fuel filter if you haven't done so lately.
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