Question about 1990 Chevrolet K2500

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1989 Chevy K2500 - idles fine but stalls out when put into drive.

1989 Chevy K2500, 350 auto. The truck is hard to start but when it starts it idles smoothly. When I floor it, the engine stumbles a bit but immediately revs up strong. This is after the engine has warmed up after 15 minutes idling.

When I put it into drive, it dies. No backfire, just stumbles and dies. I use the truck as a plow truck only. Just a few weeks ago I started it up and drove it around with out any problems.

Thanks for any insight . . . Jay

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  • 32boom Jan 22, 2009

    Thanks gmiller442 for the info. I will get some Seafoam in the tank. One thing I did notice the spark at each plug is yellow. I would have expected a blue spark. I put new plugs in, but still a yellow spark. I was going to replace the dist cap, rotor and coil . . . can't hurt!

    Thanks again for your info-very helpful. 32boom

  • Anonymous Mar 16, 2014

    Then idles ok after running awhile

  • Anonymous Mar 16, 2014

    I have a 1988 chevy truck won't idle when started dies at first then will idle after it's ran for awhile

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Sounds like the injectors may be bad or just really dirty. You say that the truck is only used as a plow truck, so I would assume that it sits alot. If you dont add any fuel stabilizer to the tank, the fuel will start to degrade and the will gum up your injectors. One thing you can do is to pull the air cleaner assembly off and look at the injectors while the truck is running. Look at the bottom of the injectors while it is running. The injectors shouldbe spraying fuel with a fan spray of fine mist. If you see any drips of fuel in the this fine mist, that injector is at least dirty or on its way out. I would recommend that you change your fuel filter and then get some fresh fuel and the purchase some Seafoam fuel injector cleaner from your local parts store. Dont mess around with anything else. GET SEAFOAM. If it is in a plastic bottle it is not strong enough to do anything. Seafoam is in a metal can. Dump the seafoam in and run the truck as much as you can. This will help clean out the injectors.

Posted on Jan 22, 2009

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