1990 Chevrolet Suburban Hot No-Restart

1990 CHEVROLET TRUCK
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HARMONC
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  • 1 POST
I have a 1990, 2500 suburban silverado with approximately 139,000 miles. The vehicle runs fine and I do not have any problems with performance. However, after the vehicle has been driven for a measure of time (greater than 20 minutes) and then shut off (to run inside a bank, put gas in, or some other sort of quick errand) it will not restart immediately. After waiting for approximately 15 minutes, then the vehicle will start as if nothing was wrong (seems as if something had to cool off). Power is still evident as all other electrical items will work. The battery is new. Does anyone know what could be the cause of this? Is it the computer?
Jan 30, 2006 at 6:20 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,616 POSTS
Could be a couple different things, first check for trouble codes to point to a shorted sensor, next test the fuel pressure regulator for fuel in the vacuum line and test the fuel pump at time of failure.
Jan 30, 2006 at 10:09 AM
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Suggested Repair

Check for trouble codes that may indicate a shorted sensor. Test the fuel pressure regulator for fuel in the vacuum line, and test the fuel pump at the time of the no-start failure.

Conversation Summary

A 1990 Chevy Suburban 2500 with about 139,000 miles runs normally but will not restart immediately after being driven more than about 20 minutes and shut off. It starts normally after waiting roughly 15 minutes, while other electrical systems still work and the battery is new. The owner asked whether the computer could be the cause. The expert suggested checking trouble codes for a shorted sensor, testing the fuel pressure regulator for fuel in the vacuum line, and testing the fuel pump at the time of failure.

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