1997 Chevrolet Silverado Engine Truns Bout Only Hits Letting Off Start Just

1997 CHEVROLET SILVERADO
221 MILES
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BOBBY 97
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  • 6 POSTS
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
Jan 5, 2013 at 7:10 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
timing chain???? why?????

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

Roy
Jan 5, 2013 at 7:12 AM
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BOBBY 97
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thought might have jumped time but didnt help spark is good fuel is good compression good
Jan 5, 2013 at 7:22 AM
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ASEMASTER6371
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what is the fuel pressure??

Roy
Jan 5, 2013 at 7:26 AM
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BOBBY 97
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60at start 48 while cranking
Jan 5, 2013 at 7:37 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
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48 cranking is too low. needs to be 60-65

60 at start??? i thought it did not run???

what motor???

Roy
Jan 5, 2013 at 7:41 AM
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BOBBY 97
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60 at srart of pump turn on / 48 while trying to start 4.3 engine
Jan 5, 2013 at 7:45 AM
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BOBBY 97
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60 psi when cranking and then a loud back fire but want start and run
Jan 5, 2013 at 8:19 AM
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BOBBY 97
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what else can i try?
Jan 5, 2013 at 9:23 AM
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