NUMBER 4 MISFIRE

1999 Chevrolet Tahoe

Tiny

mllane

June, 29, 2011 AT 8:34 PM

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.

FOUND 5709 RELATED QUESTIONS

Engine Miss

52 ANSWERS
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5 Answers

Tiny

rasmataz

June, 29, 2011 AT 9:03 PM

Check the compression and injector for no.4 cylinder

Tiny

mllane

June, 29, 2011 AT 9:12 PM

What should the compression be.

Tiny

rasmataz

June, 29, 2011 AT 9:14 PM

Should be around 140-160 psi

Tiny

mllane

June, 29, 2011 AT 9:15 PM

Ok I have 148 psi

Tiny

rivermikerat

July, 21, 2011 AT 7:48 PM

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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