Question about 1990 Chevrolet K2500

1 Answer

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

Posted by 32boom on

  • 1 more comment 
  • 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



1 Answer


  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 20 times.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 17 Answers

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


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1998 olds regency with 3800. On startup car stumbles and hesitates a bit then smooths out. If starting when car is warm it is worse and sometimes won't start at all. Sometimes reving up helps to smooth it...

How long since overall tune-up? Use a gage and check proper fuel pressure, key on engine off. vin K 48--55 psi. Also, check that the fuel pressure will hold for bit, with the key off.
Check fuel trims when problem is ongoing, see if trying to add or remove fuel? If temp related check the coolant temp sensor.
Over-fueling on a hot engine can make it hard to start. Pushing the pedal to the floor should put it in "clear flood mode" and help it to start.
Could be other issues?

May 23, 2017 | 1998 Oldsmobile Regency

2 Answers

Chevy 2002 Malibu ERG valve

Symptoms of a bad EGR valve are usually stumbling idle or the engine stalling when the car is warm (normal operating temperature). Find the EGR valve and locate the vacuum line attached to it. Start the engine cold and wait for it to warm up. When the engine starts to stumble, pull off the vacuum line. If the EGR is bad, the engine idle will stabilize and no longer stumble.

May 25, 2010 | 2002 Chevrolet Malibu

1 Answer

Car stumbles,hesitates,loses power on Hwy, randomly

Did you check earth connection of electric system?

May 10, 2009 | 1995 Oldsmobile Eighty Eight

1 Answer

1997 chevy 2500 4x4 stumbles

Fuel pump is most likely the cause. Probably just barely making the required pressure to start. Needs to maintain 60-66 psi while cranking to start.

Dec 21, 2008 | 1999 Chevrolet Silverado 1500

1 Answer

1989 chevy 350 automatic, white smoke

white smoke is antifreeze try checking the compression

Nov 08, 2008 | 1989 Chevrolet C1500

1 Answer

55,000 miles. new battery. new air filter. original spark plugs. runs very smoothly after starting. engine started having to turn over more then about 2 weeks ago. idle speed is slower I noticed. on...

You may have sludge in the idle air bypass valve and or the throttle blade is sludged up, clean them with an approved spray cleaner, call honda and ask what they recommend. You may also have a loss of fuel press due to a defective check valve in the fuel pump, in that case cranking time is increased quite a bit, as much as 5 or 10 seconds.

Jul 13, 2008 | 2005 Honda Civic

Not finding what you are looking for?
Cars & Trucks Logo

1,865 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

85239 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8984 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides