Question about 1990 Chevrolet K2500
I have a 1989 Chevy K2500 w/ 350 Engine. The truck only has 74500 miles on it and has run strong since I bought it 5-6 months ago. I had only ever had the fuel level 1/4 to 1/2 way full. Yesterday after using it for some light work duty I drove it to the gas station, and FILLED the tank with 87 unleaded. I then drove it home where I parked it and it sat for about 7 hours. I started it up last night (started fine) after 10 seconds driving down the road the truck lost power (the ''service engine soon, & check gauges'' lights appeared), I pulled over, and attempted to restart the egine but it would not. When I engadge the ignition I can hear what sounds like the fuel pump (that light ''hmmmmmm'' noise does appear to be lasting longer than usual'' then I as I turn the ignition the engine just turns over and over like it's not getting any gas.
I don't believe it was bad gas. However I have a feeling it is related to having the fuel level at FULL, maybe the fuel pump can't pump. Anyways, any suggestions would be helpful, If I find an answer I'll post back. Thanks.
You need to check the fuel pressure to the TBI. I just fought one which was doing the same thing. I pulled the fuel tank to replace the fuel pump. It turned out to be the short hose from the fuel pump to the steel line coming out of the tank. It had a split in it so I wasn't getting enough fuel pressure. Some places show two pumps available. One you can pull the unit and replace just the pump. The other the pump and sender are all one unit. Hopefully you have the first one. The second is around $300.
The easiest way to get to the top of the tank is to pull the front 6 bolts mounting the bed and loosen the back two. Take the three screws from the filler neck and unhook the rear axle vent tube. You can then take an engine hoist and lift the front of the box. You can get right to the pump and gauge assemble in the top of the tank. Most times, this works easier than emptying the fuel tank and removing it.
Posted on Dec 18, 2008
Just to let you know the fuel presure for the TBI should be 9 to 13 pounds and the pressure for the SFI model will be 40 to 55 pounds. So make sure you know which one you have.
Posted on Jan 14, 2009
Pour some gas down the throttle body see if it runs. if it does you no its fuel problem remove fuel line at throttle body check flow should be a litre in 15 seconds then pressure something like 40psi check manuel for your specs sounds like fuel pump full tank is just coincidense
Posted on Jan 08, 2009
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