I recently purchased a '96 E34 540i A/T with 170,000 km and a FSH. I drove
the car from Johannesburg to Cape Town, a distance if 1,500 km ... it went
extremely well, averaging 10.4 l/100km at 140km/h. However, each morning
when cold the engine hunts and misfires at idle (it smells like it's running
extremely rich). The revs pick up, then drop, then it misfires, then it
picks up revs. Once on the road the performance is fine. The rough idle
carries on for about twenty minutes until the engine is warm. I'd like to
solve this problem before the engine is damaged.
Thanks for all help received.
likely the PCV plate on the back of the intake.
Very common cold start issue, goes away when engine is warm.
OR a vaccuum leak somewhere.
Check the codes in the computer for a fault.
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On Mon, 10 Apr 2006 17:12:49 -0400, Sharkman BMW wrote:
I agree in that you have a vacuum leak. Intake manifold or the like. I'm
sure you have plenty of engine codes popping up because of it. And yes,
you should get it serviced, but it won't be a small job. If it's just
starting thats in error, then the ignition coil needs replacing. But due
to power loss and I'm sure it's making a bit of noise, you have a vacuum
leak as well. It's perfectly normal for the seals to degrade. Just get
your engine checked out by a bmw experienced mechanic. Good luck.
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