Got Knock? '93 Park Avenue - Page 2 - 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 04-29-2008, 12:08 AM   #11
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Originally Posted by Technical Ted
Have you checked the spark plugs?
nope, have yet to pull those, but it is on the todo list. they are prolly pretty toasted too after all of the seafoam.
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Old 04-29-2008, 02:12 PM   #12
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When you say knock are we talking about a Ping of sorts?

How is the oil pressure? and is it stable?

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Old 04-29-2008, 02:16 PM   #13
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Can you post a short video clip?
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Old 04-29-2008, 04:21 PM   #14
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When you say knock are we talking about a Ping of sorts?

How is the oil pressure? and is it stable?
Ping, i guess that is what you call it

Oil pressure unknown, but the idiot light goes out when it starts
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Old 04-29-2008, 05:03 PM   #15
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both of my L27s have ALWAYS had a lifter type of sound. like a real soft tick. is it like that?
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Old 04-29-2008, 06:06 PM   #16
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both of my L27s have ALWAYS had a lifter type of sound. like a real soft tick. is it like that?
It has that too, but it sounds like it is igniting too early, pinging, knocking, take your pick of terms. Premature detonation?
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Old 04-29-2008, 07:01 PM   #17
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Premature detonation can cause engine damage. You need to check the plugs - now.
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Old 04-29-2008, 08:05 PM   #18
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Also might want to check your exhaust manifolds for cracks.
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Old 04-30-2008, 01:36 AM   #19
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well, scanned codes, got this:

12
23
66

12- normal
23-IAT low
66-Refriderant Low

I guess that does not shed any light on anything :(
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Old 04-30-2008, 07:43 AM   #20
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if you suspect detonation, i would suggest a scanner with live data. kr will not throw a code.
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