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Re: Intermittent stalling on 535i. Motronic? (archive)
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Posted by RonW on November 24, 2000 at 13:10:10:

In Reply to: Re: Intermittent stalling on 535i. Motronic? posted by Richard Beaver on November 24, 2000 at 09:55:01:

Richard,

Thanks for the reply. I'll check out the fusebox- I've had problems with it before.
You wrote:
The Montronic unit get's this from one of 2 sensor's mounted on the lower right rear of the block. One is the reference sensor for TDC the other reads the teeth in the flywheel and provides the RPM data to the ECU.

Actually I wanted to know how the instrument tach gets its info, not how the ECU gets it. As I said, the tach keeps registering when the car stalls. With a traditional tach this would mean there was spark, but if the tach uses one of the block sensors, this theory goes out the window. On the other hand, if the tach uses the same block sensor the ECU uses, then I know the ECU is getting the sensor info. In either case I know the ECU is not actuating the fuel injectors, so it's not a fuel pump relay problem.

You also wrote:

If you don't have a Bently manual you should get one.
I have it. Very useful.

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