Mechanics

CHEVROLET SILVERADO COMPRESSION PROBLEM

1997 Chevrolet Silverado • 221 miles

The engine truns bout only hits when letting off start just aquick back fire what could this be? I have changsd the following parts[timeing chain/gears -coil -ingetion pickupcoil dist cap-wires-rotor plugs crank sensior ingnitonswitch. Still just the same. Please can you help
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Bobby 97
January 5, 2013.




Timing chain? Why?

Check for fuel pressure. Check spark and check compression. Lets start at basics first

Roy
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Thought might have jumped time but didnt help spark is good fuel is good compression good

Tiny
Bobby 97
Jan 5, 2013.
What is the fuel pressure?

Roy

60at start 48 while cranking

Tiny
Bobby 97
Jan 5, 2013.
48 cranking is too low. Needs to be 60-65

60 at start? I thought it did not run?

What motor?

Roy

60 at srart of pump turn on / 48 while trying to start 4.3 engine

Tiny
Bobby 97
Jan 5, 2013.
60 psi when cranking and then a loud back fire but want start and run

Tiny
Bobby 97
Jan 5, 2013.
What else can I try?

Tiny
Bobby 97
Jan 5, 2013.

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