Thread: Pre-ignition
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Old 02-18-2015, 06:53 AM
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cycleguy55 cycleguy55 is offline
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Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
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Quote:
Originally Posted by Andrewyoung78 View Post
My car has been running great but once in a while when I shut off, it pre-ignite?
There's no sign of pinging and what so ever. I only use chevron 92. I try to keep the fans running for cool down about a few minutes before I park to avoid the motor being too hot and my holley 770 set up to idle at 850ish.

Any idea why it does that sometime?
Generally referred to as 'run on' or 'dieseling'. I get it occasionally on my 460, so I was interested to read this - which seems to indicate too rich or too lean could both be causes: https://en.wikipedia.org/wiki/Diesel...tential_causes
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