Mechanics

NUMBER 4 MISFIRE

1999 Chevrolet Tahoe • V8 4WD Automatic • 200,000 miles

1999 Chevy Tahoe V8 4x4 with tow package 4door. Misfire on number 4 piston. Changed plugs, plug wires, dist cap and roter button. Runs rough at idle but good at highway speeds.
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Mllane
June 29, 2011.




Check the compression and injector for no.4 cylinder

Tiny
Rasmataz
Jun 29, 2011.
What should the compression be.

Tiny
Mllane
Jun 29, 2011.
Should be around 140-160 psi

Tiny
Rasmataz
Jun 29, 2011.
Ok I have 148 psi

Tiny
Mllane
Jun 29, 2011.
Did you find out anything about how the injector was operating? It sounds like it isn't properly atomizing the fuel.
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Rivermikerat
Jul 21, 2011.

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