25-.30
A 1995 Chevy Van with a 454 engine will have a spark plug gap of .060 inches. A difference of .005 (give or take) should not affect the engine's starting capabilities, however.
Spark plugs are a cheap and quick fix if one goes out. The cost to replace one on a 454 chevy engine however can differ depending in the spark plug brand.
0.035"
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0.045
The spark plug gap on 1977 Chevy truck 454 should be set at .045 inches. Spark plugs are preset at the factory and should need no adjustments prior to being installed.
The 1994 Chevrolet 7.4 liter engine spark plug gap is .034. Most spark plugs will come pre-gapped from the spark plug manufacturer.
Knowing the firing order of a cars engine will help a person diagnose problems. The firing order of a Chevy 454 mark 4 is 1-3-4-2.
A person must leave the right size gap for the spark plugs when changing them. The 1999 Chevy Suburban has a spark plug gap of .060 inches.
.045
i think .35 or it will be under hood on sticker emissions
what is the ignition timing for a 1988 Chevy 454 engine