<E34> 3.5 engine miss problem

[John G.Burns <john@xxxxxxxxxxxxxxxxxxxx>]

>I have a 91 535i that will sometimes exhibit a "miss".  It will only
>happen when cruising along at a steady speed with the throttle
>position "just off idle".  I haven't felt the problem below 1800 RPM
>or above 3000 RPM.  Sometimes, it seems a bump to the rear wheels will
>trigger it.

>This happened earlier in the car's life and I took it to the dealer
>for warranty repair.  They said that the RPM Reference Sensor was
>loose.  Anybody know what/where that is?  The only thing that I can
>find is the crankshaft position sensor on the front of the engine. 

I'm pretty sure what you see at the front is just for test
purposes on the dealer's DIS system.

The real TDC and speed sensors are on the transmission bell housing.
They sense their data from the flywheel. The wiring comes up
to a pair of three pin plugs and sockets on the metal strut 
that goes from the rocker cover to the intake manifold. Cleaning 
the wiring inside these wiring connections really helped my engine
and cured a no-start problem as well as an intermittent
stall (I also replaced about four cheap relays).

- --
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Email: john@domain.elided, John G.Burns B.Eng, Aberdeen, Bonny Scotland
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