Will not start

1995 CHEVROLET ASTRO
250,000 MILES • 4.3L • 6 CYL • AUTOMATIC
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LAURABEAULIEU
  • MEMBER
  • 1 POST
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?
Oct 21, 2021 at 1:53 AM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 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.
Oct 21, 2021 at 1:41 PM
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