Crank, stop. Crank, stop

Tiny
EDEAVER
  • MEMBER
  • 1992 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 142,734 MILES
I just replaced the cap, rotor, spark plugs and spark plug wires on a 1992 chevrolet blazer with a 4.3 port injected engine. When I go to crank, it will crank for 2-3 seconds then thump and stop cranking and slowly start cranking again but wont start. It will repeat this problem through the entire time holding the key on start
Wednesday, February 9th, 2011 AT 11:35 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.
If this is a Vortec, it requires a minimum of 55PSI to run and it should hold over 50 for a few minutes.
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Thursday, February 10th, 2011 AT 12:00 AM
Tiny
EDEAVER
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  • 2 POSTS
The fuel pressure is at 58psi and after 3 minutes it sits at 56psi
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Thursday, February 10th, 2011 AT 12:04 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Sounds like you may have a cracked distributor cap causing it to crossfire into the wrong cylinder. This is assuming you haven't messed with plug wire order.
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Thursday, February 10th, 2011 AT 12:07 AM

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