blackdeathmessenger
OBS Enthusiast
I have checked for vacuum leaks multiple times and have found none
9C1 cam with stock TBI?
- Thread starter blackdeathmessenger
- Start date
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Supercharged111
Truly Awesome
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Do you have an '88 computer in there? Only reason the truck would be looking for an IAT is if it thought it was supposed to have one, which it doesn't.
Nope, the ECM/PCM will store the code(s) for ~30 - 40 key cycles. Maybe set your timing, as suggested, and disconnect the battery to reset the EST code you'll set by doing that. Then start over to see what other codes pop up.
It's even better to put a scanner on it and data log.
blackdeathmessenger
OBS Enthusiast
Well, I did put a '91 c/k computer in it, since I've read elsewhere that it can smooth out engine idle and such. To my knowledge, and from my experience, the '91 c/k trucks should have pretty much the same sensors, with a few minor differences
blackdeathmessenger
OBS Enthusiast
Well, good to know. I also didn't disconnect the battery after I fixed the timing last time. I thought it would fix itself after I cycled the key with the connector reconnected
What service number ECM and BCC (.bin) are you running now?
blackdeathmessenger
OBS Enthusiast
The .bin would be whatever the stock one was, I didn't tune it as I don't have the capabilities to do so, or know anyone around here that can. The part number I'll have to find when I go on break
My '88 K1500 5.7L with stock computer has a Vortec cam--actually the entire Vortec short-block.
Runs fine. I did have to jack-up the fuel pressure a bit.
You haven't found the real problem, yet.
Runs fine. I did have to jack-up the fuel pressure a bit.
You haven't found the real problem, yet.
blackdeathmessenger
OBS Enthusiast
Is it possible they had multiple part numbers and I might have gotten the one that was incompatible?
Yep, you can't just swap chips from 1 ECM to another. Each .bin is coded for their own Service Number ECM. A different model ECM will be looking at a different address in the chip.
