Question about 1990 Chevrolet K2500
Cant get it to stay at 2500rpm for emissions test. What would cause this? Truck runs great no other issues.
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Posted on Jan 02, 2017
Here is the diagram,It is always a good idea to only disaasemble one side so you can use the other side as a reference,I also reccomend using a set od brake pliers,they will the disassembly and reassembly much easier.
Posted on May 30, 2009
SOURCE: My 1989 chevy 1 ton
check the anti lock solinoid to the rear brakes, it has a valve and a resiviour in it, it is in the line to the rear brakes, usually the valve or diaphram goes bad, easiest way to check it is to bypass with a piece of brake line
Posted on Oct 16, 2008
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
I have replaced many injector driver modules on these diesels. GM has redesigned it and i have never had a replacement one fail. This is a known problem for the 6.5 diesel. Unfortunately its about a 500 dollar part from the dealer, and requires intake removal, and some very tight work space to replace.
Posted on Mar 22, 2010
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