Re: E-28 Stallng problem

[John G.Burns <john@xxxxxxxxxxxxxxxxxxxx>]

> I've had my 88 535isa (55,000m) for about 10 months, and it has always had
> a weak idle.  I've replaced the idle control valve, fuel pressure
> regulator, fuel filter, spark plugs, O2 sensor, air fIlter, distributor
> cap, rotor, airflow meter boot and some other things that don't come to
> mind.

> Recently, the car has stalled a couple of times when coming to a stop sign,
> and a couple of times has felt like it momentarily started to die, then
> revived itself under partial throttle (maybe 45-50mph, steady speed, level
> ground.

You most likely have an electrical problem. Things I did
when curing the same preoblem:

	Clean every fuse and wiring connector is sight with
	fine grit paper.

	New fuel pump relay (worked for a mate, didn't fix mine)

	New main relay

	New unloader relays

My web site has a fault finding page for BMW engine problems
in general but it's geared heavilty towards the M30. Enjoy :-)

> Two key components I haven' replaced are the fuel pumps.  I've tried
> testing my fuel pressure, but I don't think I trust my elderly pressure
> gauge.

Lack of fuel pressure will cause the engine to stutter
before dying. To see what I mean remove the fuel pump relay
with the engine running (this is how to de-pressurize the
fuel system for maintenance BTW).

- --
Who needs a life when you've got Unix? :-)   
Email: john@domain.elided, John G.Burns B.Eng, Aberdeen, Bonny Scotland
Web  : http://www.unixnerd.demon.co.uk - The Ultimate BMW Homepage!

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