1991 Chevy S-10 No Start

1991 CHEVROLET
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JOLENAR
  • MEMBER
  • 1 POST
I have a 91 chevy s-10 pick up the engine turns but it will not start ive replaced the plugs wires distibutor,coil, cap, fuel filter, fuel injector and it still will not start any assistance will be very greatful thanks to everyone for being helpful
Jul 14, 2006 at 5:40 PM
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MIKEYBDMAN
  • ✓Experienced Mechanic
  • 623 POSTS
Ok, when trouble shooting a non starting engine, you test for three things. Fuel, Spark, and Timing....
So, are you getting fuel to flow? You can usually smell it if it doent start and fuel has been flowing thru your injectors.
Are you getting spark? You can lay a spark plug on top of the engine connected to the spark plug wire and see if it fires as you turn.
Last you need to see if the spark is sparking at the right time. You will need a test light for this, or maybe ask a friend to check it for you.
Usually if you are off just a little, it will fire some but not stay running, or run very ruff. If this eninge is not firing a bit, then it probably is ignition or fuel.
Have you checked your engine compression? If your timing chain has broken, you will probably have several cylinders iwth good pressure and one or more without pressure.
Jul 15, 2006 at 8:27 AM

Suggested Repair

Diagnose the no-start by verifying fuel delivery, spark, and ignition timing. If it does not fire at all, focus on fuel or ignition. Also check compression, since a broken timing chain can leave one or more cylinders without pressure.

Conversation Summary

The owner of a 1991 Chevy S-10 with a 2.5 four-cylinder says the engine cranks but will not start after replacing the plugs, wires, distributor, coil, cap, fuel filter, and fuel injector. The expert advises checking fuel, spark, and timing, and testing compression if a broken timing chain is suspected.

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