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Re: Cold start valve or thermal temp. switch or ? (archive)
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Posted by Bob on January 07, 2001 at 17:30:11:

In Reply to: Cold start valve or thermal temp. switch or ? posted by Terry Donlin on January 07, 2001 at 17:27:07:

The cold start switch and the start valve are out of the picture as soon as the engine starts, so I doubt they are your problem

I would check your DME computer's temp sensor first, and do a leakdown check to make sure that your fuel system hold pressure when the engine is shut off hot (that takes the place of the thermo time switch on a hot engine).

Bob


My '86 535i starts a little hard when cold - meaning I have to pump the accelerator to keep it running for about the first 15 seconds. (Temps around 40 degrees F.)
Secondly once I have driven the car somewhere and let it sit for 30 minutes to 90 minutes it will not start if I don't get it to start on the first attempt.
I suspect the cold start valve or thermal temp. switch.
I see that BMP sells a replacement thermal switch with a longer activation time. Could this solve the problem.
Any hints or diagnostic checks would be appreciated.




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