Mechanics

CHEVROLET TRUCK COMPRESSION PROBLEM

1997 Chevrolet Truck • 205,000 miles

Have po300 code replaced plugs, wires, fuel pump, fuel filter inector spyder, fuel sending unit & wires in tank intake plainom gasegtt run all kides of fuel cleaner in it clear codes start it let it run less then a min. Po300 code comes right back
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Bobkz1000
October 30, 2012.




Check fuel pressure first, then check for vacuum leak at manifold. If both of those good then ccheck compression 60-66 psi for anything other than a 7.4l 56-62 for 7.4L

Hmac300
Oct 30, 2012.
Thanks will get right on it will let you know
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Tiny
Bobkz1000
Oct 30, 2012.

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