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When it goes into PE it will trigger a static max timing retard with a pending knock sensor code as a fail safe, I can't think of any other code off the top of my head that will cause this same exact condition. This is the last time I'm going to repeat myself.
Sorry...not trying to be (or seem) dense, lol.
Just trying to grasp & understand something that I do NOT understand...
I appreciate all of the feedback...
So, what I think I READ above...is that your opinion is it's an actual knock sensor FAULT....causing a failsafe default of 4* KR, which is my maximum retard setting vs. RPM (in PE) ?
Just trying to run 3 more degs on E vs 93 isnt a great plan. You will need to either have it on a loaded dyno or at the track and read your plugs to see what timing it wants. My guess is your timing is to high. On stuff we re-tune we run less timing almost 99% of the time and make the same power and or go faster at the track over the old tune.
It showed 4* KR on every Naturally Aspirated pass after a minimal 100 shot nitrous half pass.
I've ran, on SEVERAL occasions, a 200, or a 250 shot, with never any KR...ever.
Run 1 - N/A, ZERO KR @ .81-.83 Lambda
Run 2 - N/A, ZERO KR @ .82-.83 Lambda
Run 3 - 100 shot, ran N2O through 1st gear, let off, hit it again, ZERO KR, WOT .70-.73 Lambda
Run 4 - N/A, 4* KR as soon as 100% TPS, in burnout box and down track (WOT .83-.84 lambda)
Run 5 - N/A, 4* KR as soon as 100% TPS, in burnout box and down track (WOT .82 lambda)
Run 6 - N/A, 4* KR as soon as 100% TPS, in burnout box and down track (WOT .82-.83 lambda)
Run 7 - N/A, 4* KR as soon as 100% TPS, in burnout box and down track (WOT .82-.83 lambda)
Unfortunately, I haven't gotten a chance to swap them out yet. I hope to, this afternoon. I keep the car here at work, and lift was tied up for 2 days. The 2 rearmost plugs seem to be easier from underneath...another negative of me being fat, LOL.
Okay...I guess my eyes are worse than I thought...I am 56 years old BTW...
I definitely see, in the pics, speckled porcelain.
I also actually dug up my old spark plug receipt, and these have actually been in there since the car was turboed, TWO YEARS AGO...
That being said, I definitely look to be getting detonation, but I also found a loose heat shield, on passenger side, above the collector and forward....the smaller one was jingling around...No idea how I didn't see the speckles, or the shield the other day...
Plugs on the shop towel, are from the driver side...
the other 3 pics are all of the passenger side.
Front to back, Right to Left
I put new ones in, gapped at .028", as well as a new more conservative tune, 2 more degrees of retard, and swapped on a 145 amp alternator I've had sitting around for it...My grandson is coming over to visit for the weekend, so I have to get home now...
Only way to really know is to install a fresh set of plugs make a hit and thin pull them. Have u made sure your exhaust etc. Isnt hitting anything making false knock?? I had a car a while back i had to disabled knock sensors. It picked up knock no matter what. Ran like a raped ape without them.
Only way to really know is to install a fresh set of plugs make a hit and thin pull them. Have u made sure your exhaust etc. Isnt hitting anything making false knock?? I had a car a while back i had to disabled knock sensors. It picked up knock no matter what. Ran like a raped ape without them.
I have some fresh plugs in, same ones (BR7EF) like I have had for 2 years now.
I did find that one small heat shield jingling around, near the starter. I went ahead and took it off since it didn't want to get tight and jiggle-free. "Hope" that was the whole problem...
I do have a "test spot" right in front of my workplace, so that's the next thing I plan to do...If it's still doing it, I'm turnoing them off and leaving them off, and that'll be it...
Finally was able to get the car unburied out of my shop and take it for a spin...
Put timing back to where it was (100% KR free) for nearly 2 years (26* total), when it was on pump unleaded 93 octane...(so, 5* lower than I've had it the last month or two, which was was 31* total)
Fresh spark plugs, NGK BR7EF gapped at .030"
52* ambient temperature,
52% Humidity,
Density Altitude 463 feet
82.7% Ethanol in the tank
60 psi fuel pressure, never budged
IAT never exceeded 76*
Still got an instant 4* of KR immediately when car goes into PE...(.82 Lambda, or 8.00:1 AFR, exactly as commanded, FWIW)
Driving along, just blipping the throttle, or sitting still on the transbrake...IMMEDIATE 4* of KR directly coinciding with PE
I disabled the knock sensors (under the PE table), and as it should be with that change, no KR.
On an actual scanner, not the HPTuners, nothing looks wrong, or out of the ordinary, as far as real time readings go.
Car idles, pulls, drives and sounds great.
At this point, knock sensors are staying OFF, since in 2 years, this will be the 2nd instance of them failing, or whatever the EFF is going on.
Last ones were AC Delco with a new harness.
Car has a 2002 Silverado ECM in it, so maybe something wonky with the wiring or whatever, but I'm done with it for now.
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