thanks for the follow up. I’m taking a break from worrying about knock, KS, KR etc. I have min temp for KR set to max right now. (I was definitely getting Knock retard - at all the MAP/RPM...

Well finding an exact match is out - no such thing as a square body suburban with vortec, roller-cam 383 running a '7427 PCM. Closer match, I'm not sure. I do have a vortec black box PCM but I have...

Yeah, that's what I'm saying, an insane amount of knock. I really don't think it's truly knocking. It seems I'd hear it and the motor sounds pretty good throughout the range, with the possible...

Thanks - Downloaded Trimalyzer. Really easy to use, had a scatter plot of my knock counts in a few minutes. (attached) but not sure what it's telling me. Most points are in the middle RPM range,...

Regarding the sealant, I'm wondering if that could be the cause of my intermittent Code 43? Body of sensor not getting good ground to block at times? Regarding the scatterplot, I've never used...

Switched to the L31 timing tables (all cells at least 3 deg less than what I had before, many up around 7 or 8 less) and still getting high knock counts and lots of knock retard. Attached is a...

I'll try that - eventually. I just put $100 of 87 octane in, as I was pumping I realized I should have put in 93 to see what it does. But I am going to pull timing and see what that does. I found...

I finally got a chance to do some data logging tonight. 27K knock counts in about a 10 minute drive. Watched the whole datalog so at least I know it didn't turn over in that time frame. So it's...

Sorry for the long delay in reply - I was out of town with no access through Sunday night. After changing plugs and fixing the things I think were causing noise, I haven't driven it much - no...

Thanks, great input. My 383 has about 9.5:1 - I agree I think the 44s are too hot for it. I also have a Vortec 355 with similar compression in my '76 Corvette and I've always run 43s in that. But...

Thanks everyone. I went out and poked around tonight. My PS exhaust manifold has a heat stove around it (the kind that sends warm air up to air intake for cold operation) that is loose and may be...

So I'm not entirely sure what I did other than re-install the correct knock sensor, but now my code 43 problem has shifted to intermittent. It does not come on within 30 seconds of key on or engine...

Awesome - thank you for the fault tree. So sounds like the consensus is that this is for a '7427 auto truck?

I might have solved this issue with the KS, but not exactly sure how.

First, I'm fortunate to live in the same city as Dave W (Vancouver, WA) He let me try a different 7427 and memcal. Exact...

Yep, you're correct, they are. I tested resistance on both, old one was around 100K ohms which AFAIK is right within spec, but the new one was only testing around 2K. So I swapped them and am...

Pretty sure I have the correct KS: Delphi AS10016. As recommended by @daveW and it's what shows up for a '94 350 truck. I'll try and reseat the memcal - thanks great suggestion. I really think it's...

Thanks, it's a '91 squarebody suburban, but I'll check for any wire issues. I have previously checked for continuity between the PCM and KS - good, but maybe there's a persistent problem with a...

duplicate post

I decided to start a new post for this situation since it's very specific. But background here on my '7060 to '7427 conversion if it's helpful. Still lots to resolve on the conversion, but I think...