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West Point
The Library
6.4 Tech & FAQ
Weird rev limiter issue.
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[QUOTE="Petro, post: 1564520, member: 751"] They're brand new. Haven't load tested them but it whips right over when cranking. After pondering on this most of the morning, I'm going to try a cam and crank sensor. I think the pcm uses engine rpm to gauge what percentage to run the alternator at. Well obviously the pcm is losing the tach signal as shown on my scanner for some reason. Soo if the pcm is seeing zero rpm, it will obviously trip the battery light the same way it does if you're sitting parked with the key on. This also explains why my cruise gets shut off and I have to turn it back on instead of just hitting resume after this happens. The pcm essentially thinks the engine shut down momentarily. My biggest question though is why isn't this throwing a code for either sensor or losing sync? [/QUOTE]
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Weird rev limiter issue.
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