e39 delayed rpm signal at cold start? - BMW Forum - BimmerWerkz.com

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post #1 of 1 (permalink) Old 11-23-2008, 03:36 PM Thread Starter
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e39 delayed rpm signal at cold start?

Hi guys, having a weird problem that three separate shops don't understand. At the initial start after sitting all night I have to crank the car 3-4 times before it starts. After that it will start perfectly through out the day. Every sensor and gasket is new on this rebuild. The only thing noticed is that the RPM signal for spark is delayed a good 3-4 seconds at cold start before it will give the signal for spark. Any ideas what could cause this? Starter is new and alternator as well as any other sensor parameter we could think of check out fine. HELP!
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