J
johnsonmtz
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.ICM was the culprit. I installed a new one and the engine fired immediately. Prior to that I had zero spark. I didn’t see any...
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.That's the route I'm thinking is the ICM was possibly damaged. I'd like to test it to confirm before just replacing, but I also know...
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.That's what I figured. Re-reading your post on the 4.3L using two but GM using a universal harness makes a lot of sense. KISS indeed.
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.Gotcha, now I don't feel quite as crazy. Is there any advantage to running a 2nd O2 sensor? I didn't think the PCM on these older ODB1...
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.I can't see any stripes on the wire, it looks solid purple to me unless they used a really dark color for pink. I have the manuals but...
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Jjohnsonmtz replied to the thread Single Purple Wire in engine bay 1989 K1500.It sure could be the O2. There is a single wire connector on the driver side coming out of the harness that connects with the O2 sensor...
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Jjohnsonmtz posted the thread Single Purple Wire in engine bay 1989 K1500 in Engine Performance + Maintenance.I'm tracking down a no spark condition on my 1989 K1500 5.7L . While probing around the distributor I came across this single wire plug...
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Jjohnsonmtz replied to the thread Backlighting for Climate Control and 4X4 shifter always on.This definitely falls outside the normal cause for electrical issues. But you’re right, never rule out the oddball reason for a problem.
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Jjohnsonmtz replied to the thread Backlighting for Climate Control and 4X4 shifter always on.Sorry it’s been so long but I want to wrap up this thread. I finally got a chance to pull out the fuse panel and see which wire was...
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Jjohnsonmtz replied to the thread '89 700R4 - Rebuild or Install Reman?.Got it, so in this case bigger really is better.
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Jjohnsonmtz replied to the thread '89 700R4 - Rebuild or Install Reman?.After the rebuild I do intend to tow boats with this truck. Mostly it will be my bass boat (2,500 lbs boat/trailer) and occassionally...
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Jjohnsonmtz replied to the thread '89 700R4 - Rebuild or Install Reman?.Thanks guys. Due to timing, my insanely busy schedule, and your advice I'm really leaning toward letting the shop do the rebuild even...
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Jjohnsonmtz replied to the thread '89 700R4 - Rebuild or Install Reman?.Thanks for the info Nick. Yes, I was concerned about the quality of the reman and what weaknesses they address during the rebuild...
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JI had the 700R4 in my sons '89 K1500 rebuilt about 2 1/2 years ago. This was during Covid of course and the shops I knew were over 2...
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JI have an '89 K1500 with a constant BRAKE! warning on the dash. The truck had the classic mushy brake pedal and I read you can replace...
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