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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 10-13-2004, 05:41 PM   #1 (permalink)
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Well i picked up a 1985 535i and put some money back into it new distributor cap and new plugs, new fuel filter and new tires, timing checked, tranny flushed, same with anitfreeze... etc. I still have a problem tho. My car hesitates when i really step on it when i have the car on. It does it more when the car has just started but im still not sure where to go with it. The mass air sensor doesnt need to warm up so i dont think its that. Theres alot of pressure on the fuel line, If anyone has any clues please tell me its my first bmw so im all ears for any advise thanks
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Old 10-13-2004, 07:54 PM   #2 (permalink)
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Bmw 535

Check the air bypass valve in the fuel injection system, if you haven't
replaced it already. Many people often miss it.

good luck
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Old 10-13-2004, 07:59 PM   #3 (permalink)
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I had the exact same problem with the 3.5 in my 6. I replaced the idle-air stabilizer valve and it took care of the problem. Just a thought.
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Old 10-14-2004, 04:20 PM   #4 (permalink)
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Air filter, check your o2 sensors.
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Old 10-14-2004, 04:37 PM   #5 (permalink)
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automatic or manual

injectors clean?
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Old 10-19-2004, 06:12 PM   #6 (permalink)
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Originally posted by Hoppy's535i@Oct 14 2004, 04:37 PM
automatic or manual

injectors clean?
[snapback]211336[/snapback]
Its a manual and the injectors are clean. I had them cleaned a month ago at least
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Old 10-19-2004, 06:13 PM   #7 (permalink)
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Originally posted by billB@Oct 13 2004, 07:54 PM
Bmw 535

Check the air bypass valve in the fuel injection system, if you haven't
replaced it already. Many people often miss it.

good luck
[snapback]210750[/snapback]
Do you have a picture of what that looks like? thanks for the tip ill havent done that yet so i will have to
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Old 10-19-2004, 06:14 PM   #8 (permalink)
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Quote:
Originally posted by '89 635 csi@Oct 13 2004, 07:59 PM
I had the exact same problem with the 3.5 in my 6. I replaced the idle-air stabilizer valve and it took care of the problem. Just a thought.
[snapback]210757[/snapback]
Ill check into that, how much would one of those cost so i could get an idea, thanks
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