2005 Chevrolet Equinox P0305 misfire

2005 CHEVROLET EQUINOX
117,000 MILES • 3.4L • 6 CYL • FWD • AUTOMATIC
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RACINGREXT
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  • 1 POST
I have replaced spark plug, plug wire and coil pack. I am preformed ejector balance test which all 6 injectors dropped 18 psi. I made sure the pcm was firing the ejectors with a noid light. I have pulled the right side rocker cover and inspected the valve spring and rockers. I have had someone roll the engine over while I watch the rocker arms and valves go up and down. I have preformed a compression check and it has a 165 lbs of compression. I can feel the misfire so it is not a phantom misfire. I am out of ideas to fix the misfire. Thoughts?
Nov 16, 2015 at 4:09 PM
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CAR-MAN145
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  • 321 POSTS
I would check for a vacuum leak at the intake manifold at or around cly #5
Nov 17, 2015 at 1:55 AM