1994 Chevy Astro Engine turns over will not fire

Tiny
LARRY BOW
  • MEMBER
  • 1994 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 300,000 MILES
My Van had been starting just fine and running fine. I parked it as usual yesterday. But today the engine just turns over and over. There was no indication there was any difficulty. It appears that something is not letting the engine fire. What can I do to correct problem? Is there a diagnostic tool (if any) availble to check for this problem?

updated 12/15/08
The second part of my question was not answered. The question: is there a diagnostic tool available to check engine/ elect. Eg (ALDL) Also, fuel is getting to the injectors but the engine is not fireing--what next?
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Wednesday, December 10th, 2008 AT 10:46 AM

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Tiny
BLUELIGHTNIN6
  • EXPERT
Hello
Thanks for the donation

Since the engine is indeed TRYING to crank, we now already rule out a faulty starter, alternator and battery.

What you need to do now is to test for proper fuel and spark to the engine. The easiest way to check for spark is to unplug one of the spark plug wires and let the spark jump. If you see a bright blue spark jumping, then there is sufficient spark. If you see a dull orange spark then the plugs and/or plug wires need replacing. If there is no spark at all, there are a few components that it could be, so just post the results.

To test for fuel, use a fuel pressure gauge and check the pressure of fuel at the fuel rail. If proper fuel pressure is present, check the fuel injectors to see if fuel is making it to them.

Just post your results and I will follow up.

Thanks for using 2carpros. Com!
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Wednesday, December 10th, 2008 AT 11:24 AM
Tiny
BLUELIGHTNIN6
  • EXPERT
Sorry for that Larry Bow

You can have one of your local auto part stores such as Advance Auto Part or AutoZone run a diagnostic scan on your vehicle for free. This will only work if the check engine light is illuminated though. You can pay a dealer to run a diagnostic scan with there higher tech equipment without the check engine light being illuminated, but this usually runs over $100 just for the test.

Okay, so fuel is getting to the injectors. Next you need to see if there is spark to burn that fuel. Carefully pull off (one at a time) the boot from the spark plug and let the spark jump from the boot of the wire to the plug while an assistant is cranking the engine. Each plug and wire should have a bright bluel spark. If one or all of the plugs have a dull orange spark, or no spark at all, this is usually an indication of faulty plugs, wires, or coil pack(s).

Again I apologize about the second question not being answered first time.

Thanks for using 2carpros. Com!
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Tuesday, December 16th, 2008 AT 12:18 AM
Tiny
BLUELIGHTNIN6
  • EXPERT
From: bluelightnin6
To: Larry Bow
Posted: Wed Dec 17, 2008 1:35 am
Subject: Your question has been answered.

Your question has been answered. Follow the link below or copy and paste it into your web browser to retrieve the answer. You can follow up and use the "reply" button to give any more information about the topic.

Thanks again for donating!

http://www.2carpros.com/forum/here-vp426941.html#426941
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Wednesday, December 17th, 2008 AT 1:31 AM

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