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ECU info #2 - EPROMs 700 1989

posted by  Zee on  Thu Feb 6 19:21 CST 2003
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last visit: Sat Oct 27 10:07 CST 2012
[RELATED]

I am curious to know how you diagnosed your ECU as "bad".

The part about the bad chip being on the fuel pump relay circuit and causing a no-start condition is especially interesting to me.

My '89 720 Turbo has run nicely for about 30 minutes, and then just stopped. I checked all the electrical connections, it has spark (I can get carb cleaner to burn after it is blown into the intake), but I don't hear the main fuel pump.

I have jumped the fuse positions and made the main and in-tank pumps run, but the main pump does not seem to run with the key.

A good fuel pump relay made no difference.

So, If you can help be discover if my condition is this EPROM chip, I'll send it to you, if it is bad.
--
1989 740Ti 1986 240DL 1984 244GL






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