C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Knocks like crazy when cold

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Old Aug 17, 2004 | 03:03 AM
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Default Knocks like crazy when cold

Working with an 87 that knocks beyond belief until warm (Closed loop?)

Haven't set the initial timing yet since replacing the dist cap with new recently.

Does the knock circuit not take part until closed loop?

-JRC-
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Old Aug 18, 2004 | 11:17 PM
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Knocking or piston slap? Does it do it when idling or under load? If it does it when cold and idling, could be piston slap, especially with forged pistons.
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Old Aug 18, 2004 | 11:38 PM
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Might be... Wouldn't this be a more repeatable event? What we're experiencing is a new event in a long series of system problems. Can't figure if this is coming from the ECM or other stray electrons!
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