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Re: How do I kill this automatic function?
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Originally Posted by chris989
you might be lean because of the advanced timing. I think it calls for TDC with the wire disconnected. I think the computer advances it up to 42 degrees at light cruise?? I will have to open a bin file to double check.
a few hundred knock counts is nothing to worry about. it is normalish. just starting the engine will cause some.
What motor do you have? My TBI is stock at 9.4-1
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Engine is a 87 TBI 7.4.
Doing more investigating and this engine does not have a knock sensor or the ESC circuit. So I think the knock counts are a BS number since this system has no way to sense for a knock. Looking at the logs it appears that the number just increments from 1 to 255 then resets.
It looks like part of my problem may be a bad ignition module which is causing the Code 42. Ran through the diagnostic chart last night and ended with the result of bad module, so I have a new Delco unit ordered.
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87 R30 CC Dually, TBI 454, NV4500, zero rust barn find
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
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