Fuel Pump Check Valve - BMW Forum - BimmerWerkz.com
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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#1 (permalink) Old 11-02-2004, 11:18 AM
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first off i just wanted to say how much of a help this board has been, thanks guys.
heres my problem. after sitting overnight my e28 doesnt start right up, it takes about 2 or 3 times, and i feather the gas a bit to keep it from stalling, but once its up it runs brilliantly except for an eratic idle and the sickining smell of gas. ive been researching and have heard about the fuel pump check valve, supposedly a $4 fix. i was wondering if anyone could tell me exactly how and where to install this part. heres the part number for reference...16 14 9 068 988.
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afroken
1983 528e auto
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#2 (permalink) Old 11-02-2004, 01:35 PM
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Low fuel pressure can cause this lean misfire when idling, which causes too this too much increase in HC emissions. Did you try to check your fuel pump relays?
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#3 (permalink) Old 11-03-2004, 10:55 AM
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This sound more like a fuel leak because of the smell check all the feul hoses and clip the hoses crack and the clips work loose the leak will drop feul pressure and stop it starting first time.
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#4 (permalink) Old 11-03-2004, 11:36 AM
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good point leaking will have pressure reduction indeed
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#5 (permalink) Old 11-08-2004, 09:47 PM
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thanks for all your help guys. i finally figured it out. the cold start valve is leaking gas from the seam where the actual spraying device is attached to the electric connector...replacing.
afroken
1983 528e
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#6 (permalink) Old 11-08-2004, 09:53 PM
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Afroken
glad it is sorted out
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