1995 Chevy S-10 Starting problems.

Tiny
WISKAS42015
  • MEMBER
  • 1995 CHEVROLET S-10
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 3,000 MILES
The truck has a new 4.3L Vortec motor and ran fine for the first three months and it recently had starting problems so I replaced the starter. It still had problems so I replaced the battery as well. The alternator still works fine. The starter is turning it over but it won't start. My only guess at this point is that the fuel pump isn't working but I can hear it engage when I turn the key to on. I can't seem to find the reason it won't start.
Friday, June 5th, 2009 AT 5:20 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the fuel pressure to rule out the fuel pump if okay look for ignition spark
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Friday, June 5th, 2009 AT 5:50 PM
Tiny
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What's the easiest way to check for ignition spark?
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Monday, June 8th, 2009 AT 6:28 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, distributor pick-up coil, ignition control module, cam and crank sensors- Note: If it doesn't apply disregard it
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Monday, June 8th, 2009 AT 7:00 PM
Tiny
WISKAS42015
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  • 3 POSTS
So I tested the spark using a spark plug off of my old trans am and with the spark plug wire disconnected it started up on the second attempt at checking for spark. Bad plug?
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Wednesday, June 10th, 2009 AT 5:23 PM

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