Lets talk about my KR (update 11-28) - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 10-05-2007, 05:31 PM   #11
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Who installed the cam?
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Old 10-05-2007, 06:04 PM   #12
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Quote:
Originally Posted by Rogue
Who installed the cam?
Boosty (Bill Bostik) helped him install the cam.

Ed
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Old 10-05-2007, 06:04 PM   #13
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Who installed the cam?
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Old 10-06-2007, 01:00 AM   #14
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Quote:
Originally Posted by BillBoost37
Previously I thought you said everyone was sure it was the pcm tuning. Now they are sure it isn't the tuning?

You've added more air, changed the cam, etc etc and no one is figuring it'* tuning any longer?
Everyone was, until i told them i get the 15 degrees of kr even in park just free reving. that means no engine load ect.
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Old 10-06-2007, 01:03 AM   #15
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I have not tired higher octane, but i have tired lower. At first i was running 97 octane and had the 15 degrees of KR, then i moved up to 93 and still had the same amount 15 degrees.




And i can not hear anything at all. I may try to pcm, just because it is so easy to do it and cannot hurt. I am going to do it this weekend.
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Old 10-07-2007, 03:23 AM   #16
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Tried unpluging the sensors one at a time?
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Old 10-07-2007, 09:15 AM   #17
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no, talk to me about that.
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Old 10-07-2007, 11:24 AM   #18
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Quote:
Originally Posted by TJ'sblackbonne
no, talk to me about that.
You could unplug one sensor at a time to isolate where the knock is coming from.

Ed
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Old 10-07-2007, 11:31 AM   #19
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Ok, that makes sense. I will try that.

I am also thinking about taking a scope and listening to everywhere to see if i can hear any sounds the pcm maybe picking up
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Old 10-07-2007, 03:22 PM   #20
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Quote:
Originally Posted by TJ'sblackbonne
Everyone was, until i told them i get the 15 degrees of kr even in park just free reving. that means no engine load ect.

TJ... please explain to me why free revving has ANY bearing on why your KR can't be a tuning issue. Whether there is load on the engine or not, you're still pulling in WAY more air at any given MAF frequency than your tuning tables are calibrated for. I'm still maintaining that it'* a tuning issue with your PCM. Since when has any stock 3800 PCM ever been able to adjust enough for a huge change like a cam? As far as I can remember, it hasn't happened.

Buddy, I'm not trying to be a jerk here, but it'* time you started changing some parts and experimenting a little. This has to be the third different thread where your KR has been discussed, and all we do is theorize about what the problem might be. Unfortunately we are not able to pinpoint the exact cause of the KR, or even if it is real or false. You need to start testing parts, swapping sensors, changing PCM chips.... whatever it takes.

My guess is still the chip. I might be wrong, but you gotta start somewhere. I know your money situation isn't fantastic, but if you want to get to the root of this problem it seems you'll have to spend a little dough.
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