1999 Chevy Astro Engine dies after starting warm or cold

Tiny
POSTMOD
  • MEMBER
  • 1999 CHEVROLET ASTRO
Electrical problem
1999 Chevy Astro 6 cyl Two Wheel Drive Automatic 255K miles

6 months ago the van would not start after driving it for 20 minutes. I took the fuel pump relay out let it cool down & then put it back b/c it seemed like I didn't hear the pump noise. It started up and drove ok. 2 months later while driving in 110 heat in las vegas the van stopped in traffic & would not start. That same day it would sometimes die at stoplights in but always start right back up. Seemed like heat was getting to the relays. In vegas I cooled down the relay with an ice chest and left the top fuse cover off. It started right back up and ran fine. When I got home I replaced the fuel pump relay and everything was ok. Now 2 months later the problem is back. The van dies after I start it up for the first time or in the last 2 weeks it will die after it has been run for 30 minutes. [It dies immediately after restart] The fuel pump was replaced 2 years ago. Seems like the problem is the fuel pump relay but that has been replaced with one from autozone.
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Friday, December 12th, 2008 AT 2:45 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi:
Because this could be caused by many things, I recommend having the computer scanned at Auto Zone to see if there are any codes. Also, when it dies, can you hear the fuel pump cycle?

Let me know what you find.

Joe
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Tuesday, December 16th, 2008 AT 3:51 PM
Tiny
POSTMOD
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Thanks for your help

I took the van to autozone on saturday and the computer said there were no fault codes. The ck engine light is not on.

Going out to the job this morning the wan died for 1 second while driving at highway speeds. [Mid way in the trip ]

The same thing happened when returning. The van died for 1 second while driving at 65 mph. [ Mid way in the trip]

just like turning off the key and then back on. No hesitation or stumble. I drove in the slow lane after that because I thought it might die completely.
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Monday, December 29th, 2008 AT 9:33 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
The only thing I can figure is there is a problem with the crank sensor, ignition module. That doesn't happen long enough to set a code. Problems like this are hard to find until they get worse because there is no help from the computer and it could be many different things. At this point, I have to say I'm not sure other than a guess, and a guess will do nothing other than cost money. I will post your problem with other techs to see if they have any ideas.
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Monday, December 29th, 2008 AT 11:02 AM

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