Will not start

Tiny
LAURABEAULIEU
  • MEMBER
  • 1995 CHEVROLET ASTRO
  • 4.3L
  • 6 CYL
  • AUTOMATIC
  • 250,000 MILES
Engine has no spark. Not the cap or rotor, plugs or, wires, ignition coil module, or fuel pump or filter. What could be the reason or will not start?
Thursday, October 21st, 2021 AT 8:53 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,709 POSTS
Hi,

It sounds like you replaced a lot already. To get spark, you need to first have power to the primary ignition coil wire. The power is supplied when the key is turned to the run position or start position.

If you haven't already, check for power to the primary circuit wire. See pic below. Note: Some of these had the coil in the distributor cap and others had a remote coil. I highlighted both primary connectors. The wire should be pink in color.

Additionally, I included the wiring schematics for the engine control circuits. I highlighted the coil primary circuit wire. Note that power comes from the ignition switch. Confirm it has power.

Let me know what you find.

Joe

See pics below. Note: I had to cut the schematics in half to make them readable for you. I did overlap them so you can follow from one to the next.
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Thursday, October 21st, 2021 AT 8:41 PM

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