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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
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Wednesday, February 9th, 2011 AT 11:35 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 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
  • 20,757 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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