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745T no start problem (long) 700

posted by  kerry on  Sat Nov 6 18:15 CST 2004
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last visit: Thu Sep 11 08:15 CST 2014
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Just a wuick questiond on a no start problem I experienced...

A friend called with a no start problem on a 91 745se. After picking her up and providing a loaner car, I bought and installed a new RPM (speed sensor)and the car started just fine.

Her husband calls 24 housr later stating that the car won't start. Now there are no other precursor symptoms, and the only other failure mode is the radio supression relay. I tried swapping the fan relay for the radio supression relay and the car started with no problem. I then shut off the car and switched the relays back, and the car started fine.

I decided to keep the car for a few days to see of the problem re-pccurred, and sure enough it happened today.

In the meantime, I have acquired some extra relays, and after swapping the relay out far another used relay, the car again started fine.

Here's the questions:

Are there any other failure modes that can happen with no warnings, and can the radio supression relays be re-soldered a la the fuel pump relays?

Thanks-

Kerry






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New 745T no start problem (long) [700]
posted by  kerry  on Sat Nov 6 18:15 CST 2004 >


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