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Power Strokes
7.3 Tech
Irregular idle revving up and down VIDEO & Update!
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[QUOTE="Iso-baric, post: 1566955, member: 32327"] Any chance you've had the 42-pin connector at the PCM off recently? I agree it sounds like you are having a 5v issue - whether it be a pushed pin or wiring break. I'd grab a multimeter and ohm between pin 21 (+5 VREF) and the ICP sensor (at least in the diagram I have this is the last sensor in the chain) while someone else unplugs sensors / jiggles harnesses. Here is a good link with schematic / pin outs. [URL unfurl="true"]https://sites.google.com/site/woodnthings8/2002-f-350-superduty/superduty-electrical/wiring-diagrams[/URL] [/QUOTE]
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Irregular idle revving up and down VIDEO & Update!
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