Mechanics

POPS IN THE EXHAUST WHEN IT SHIFTS AT CLOSE TO 5,000 RPM. IT'S AN AUTOMATIC LT1

1992 Chevrolet Corvette • 94,000 miles

1992 Corvette LT1 Auto Trans. When you get on it hard and it shifts close to 5,000 rpm it seems to pop it the exhaust.
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James Gustafson
April 8, 2012.




Could be a weak exhaust valve. A compression test will verify

if it is when you let off, the AIR diverter valve could be the issue.

If it is on accelaration, it also could be a worn camshaft lobe.

Make sure the basics are covered like the plugs, wires, cap and rotor.

Roy



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