Reply to "Engine is dieseling badly on shutdown - Seeking advice"

It diesels with idle set low, even 800 RPM.

Compression ratio is estimated because of the dished pistons. The heads are 1970 4V 351C D0AE closed chamber 62.8cc. I might try Autolite 24 spark plugs.

A vacuum leak is a possible root cause. The engine idles with 14 inches vacuum. I worked on another similar engine and it had 17 inches. I will start looking for a vacuum leak.

Thank you all.

1/8/244:31 PM

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