ENGINE KNOCK. - 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 12-24-2006, 02:38 AM   #1
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Default ENGINE KNOCK.

**edit by moderator** i notice my engine was knocking horribly. the battery also drains down when it idles extremlley rough, it is mis firing alot n i think it may be runnin on only 4 cylinders as of now. My cat is gettting extremley hot which means its misfiring n i have no idea what causes this n why the voltage drop. thanks

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Old 12-24-2006, 08:52 AM   #2
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Is the accessory drive belt attached? Does the crankshaft pulley wobble as it spins? Is the coolant level to the top of the radiator, and is the recovery tank full? Can you tell if the noise is coming from outside or inside the engine? From the front or back? High or low? What is the engine oil level? What is the engine oil pressure when warmed up? How long since new plugs and wires? Are the battery cable connections clean and tight on all attachment points? Have you tested the battery or alternator? Is the engine bouncing around or rocking a lot as it misfires?

Your answers will help lead us to a diagnosis.
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Old 12-24-2006, 11:07 AM   #3
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And where are you located?
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Old 12-24-2006, 06:02 PM   #4
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coolant level should be good just had a recent flush about 3 thousand miles ago, battery is good, new performance wires n iridium plugs about 6 thou ago n i am located around PL minnesota
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Old 12-24-2006, 06:05 PM   #5
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Quote:
Originally Posted by 95bonneSSE
coolant level should be good
SHOULD be good? Go out and check it now please. There'* a very good reason this needs to be ruled out.
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