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91 S-10 Blazer 4.3 liter

Tiny
EMMELL2560
  • MEMBER
  • 1991 CHEVROLET S-10
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 124,000 MILES
91 s10 blazer 4.3 just installed new distributor have spark, have fuel, engine will not start just's turns over
Saturday, April 2nd, 2011 AT 9:12 PM

10 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Were you having this issue, before you worked on it? If the computer doesn't see an rpm signal, it won't pulse the injector/s. With bypass ignition system and o/p switch in the fuel pump circuit, it is possible to have spark at the plugs and fuel pressure, engine cranking, even though the computer doesn't see an rpm signal, but, no rpm signal, no injector pulse.
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Saturday, April 2nd, 2011 AT 9:22 PM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If TBI, can you see injector spray pattern, engine cranking?
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Saturday, April 2nd, 2011 AT 9:23 PM
Tiny
EMMELL2560
  • MEMBER
  • 4 POSTS
Blazer was running fine and just shut off like someone had turned off ignition switch. Had bad pickup coil in distributor so I replaced distributor, cap, rotor, wires. Can smell and see fuel in tbi after cranking. Where do I go from here? Thanks Chris
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Saturday, April 2nd, 2011 AT 11:38 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
If u replaced the complete dist. U need 2 remove it get the motor on top dead center then put it back in with the rotor pointing to the #1 wire on the dist. Cap.
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Sunday, April 3rd, 2011 AT 12:11 AM
Tiny
EMMELL2560
  • MEMBER
  • 4 POSTS
Thought It might be a timing issue will try in am when I can see. Was having a hard time reading degrees on pointer to find zero. Do you know which end of pointer 0 is at?
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Sunday, April 3rd, 2011 AT 12:28 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Also check the fuel pump and oil pressure switch
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Sunday, April 3rd, 2011 AT 8:20 AM
Tiny
EMMELL2560
  • MEMBER
  • 4 POSTS
I have fuel in tbi. Where is the oil pressure switch? Do you mean sending unit? And how do I test it to see if it's bad?
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Sunday, April 3rd, 2011 AT 2:25 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
If u removed the dist. And didnt put it back right the engine is out of time.
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Sunday, April 3rd, 2011 AT 4:26 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Parts store will have the firing order and location of #1 wire on the dist. Cap. Then install the wires going clock wise. Gl
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Monday, April 4th, 2011 AT 6:12 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
F/O clockwise 165432
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Monday, April 4th, 2011 AT 6:26 AM

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