kr and pinging - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-05-2005, 06:46 PM   #1
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Default kr and pinging

I have a 93 ssei with 2.2 pulley gutted air box, colder plugs, flowmaster exhaust,180 stat, boost mod, tps mod, high speed fan switch. The car usually runs around 170 -180 degrees. I get massive amouts of kr to the point that the car actually pings. upwards of 20 degrees. I have changed the knock sensor and the computer with no difference. The car is giving no codes. Any ideas????
What is the average amount of spark advance that a car should have at wot? I have seen numbers as high as 50 degrees but not necessarily at wot
I have about 24 degrees at idle, is that correct?
The other thing is that when the car is pinging the scan tool shows no kr. When i let off the throttle the pinging goes away and then the scan tool shows kr.
My next idea is that the chip is screwed, reading on alldata the chip plays a major role in the control of kr, is this true?
Any advice would be appreciated !!!!
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Old 06-05-2005, 06:51 PM   #2
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i think that 2.2 is causing maybe alittle too much boost
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Old 06-05-2005, 06:52 PM   #3
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It might be causing some but most guys that are out there are running 2.2 with no trouble
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Old 06-05-2005, 07:16 PM   #4
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Do you have an aftermarket chip? If so trying replaceing with your stock one. Also if possible try a larger pulley. Pull your plugs, tell us how they look. Also scan your L-Trims.
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Old 06-05-2005, 07:24 PM   #5
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Still running the stock chip. I will try putting the stock pulley back on.
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Old 06-05-2005, 07:47 PM   #6
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you run 91+ octane?
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Old 06-05-2005, 07:48 PM   #7
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92 is the highest available here and that is what I run
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Old 06-05-2005, 09:12 PM   #8
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What do you have for plugs? Tell me it'* not Bosch. I suggest NGK TR55 gapped at .050 or .055". I used to have a similar problem, though I never had a scantool on it, so I can't attest to that part. But the 1 range colder plugs certainly helped out.
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Old 06-05-2005, 09:19 PM   #9
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plugs are exactly what you said, but gapped at 60
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Old 06-05-2005, 09:22 PM   #10
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Pull the plugs....check them out....and regapp at .55" as suggested above.
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