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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 11-11-2009, 08:07 AM   #1 (permalink)
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still cutting out

there must be someone on this site who has had this same problem i carnt be the only one. my 523i auto ('98) keeps cutting out. every so often when u pull up at lights or are about to take off the car splutters and pops a bit then stalls. I put it back into park then restart it and its back to normal, was originally told it may be the switch on the back of the ignition (if faulty the contactors warm up n seperate therfore breaking ignition contact) however im starting to think it may b the fuel pump(or things associated to it ,fuses etc...) CAN ANYONE GIVE US A CLUE as to what this pain in the arse of a problem could be?????????????????????????????????
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Old 11-11-2009, 08:56 AM   #2 (permalink)
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So if it just sits in your drive at idle in P is it ok and if you apply throttle does it rev ok ?
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Old 11-11-2009, 02:10 PM   #3 (permalink)
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yes it runs and drives fine for most of the time it revs quickly n smoothly, just every now n then its dies its drivin me nuts iam pretty sure its gonna turnout to be a fuel pump problem by the way its cutting out.if it was the ignition then i think the cut out would b more frequent than it is (was previously told it was faulty contacts=heat created=loss of contact)but it restarts and drives fine immediatly afterwards so would not suggest a fault like this because the back of the ignition would need sufficent time to cool before reastablishing contact an the fact it restarts immediatly seems to me to point to a loss of fuel for a short time (hence the bit of a splutter n backfire before it konks out) do u know if there r any main fuses for the fuel pump in the boot? as ive had a few problems with wires being split in the boot and am wondering if there is anything to do with the fuel pump inthere???? (p.s cheers for gettin back to me ur the only 1 so far
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Old 11-12-2009, 03:52 AM   #4 (permalink)
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I am also leaning towards a fuel problem, have you changed the fuel filter lately, they are supposed to be changed bi-yearly, as your problem seems to come and go there may be a foreign body in the filter which is cutting the flow for a millisecond

If the filter is new, then I would be looking at the pump as there seems to be a pressure drop in the fuel rail, worth checking the fuel lines for leaks if you have a leak the pressure will drop...
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Old 11-12-2009, 01:50 PM   #5 (permalink)
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thanks mate, aprieciate the help
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Old 11-17-2009, 05:46 AM   #6 (permalink)
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Unhappy Aaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhh

Had The Filter Changed And Its Still Doing It, Cut Out Thismorning As My Misses Stoped At The Lights Iam Just About Ready To Set Fire To This Car Its Doing My Head In Aaaaaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrrrgggggggggggg ggghhhhhhhhhhhhhhhhhhhhh
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Old 11-17-2009, 06:00 AM   #7 (permalink)
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You say it splutters and back fires:

Common causes of backfires are:

Poor or unregulated engine timing is often a cause of intake backfires, but can also be responsible for exhaust backfires.

Improper wiring in the ignition can also lead to timing issues and backfires
Low fuel pressure, clogged fuel filters, and weak fuel pumps could cause a severe lean air-to-fuel ratio during fuel injection.
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Old 11-28-2009, 06:57 PM   #8 (permalink)
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Originally Posted by jonnny b View Post
there must be someone on this site who has had this same problem i carnt be the only one. my 523i auto ('98) keeps cutting out. every so often when u pull up at lights or are about to take off the car splutters and pops a bit then stalls. I put it back into park then restart it and its back to normal, was originally told it may be the switch on the back of the ignition (if faulty the contactors warm up n seperate therfore breaking ignition contact) however im starting to think it may b the fuel pump(or things associated to it ,fuses etc...) CAN ANYONE GIVE US A CLUE as to what this pain in the arse of a problem could be?????????????????????????????????
AMF, ICV?
have you figured it out in the end?
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