truck guys..

[fasterblaster09]

Well yesterday I picked up a 1999 gmc sierra extended cab truck, has the 4.8l, and has high miles (217k). Truck runs very smooth, doesn't skip a beat. BUT this morning when I went to start it, it took a few seconds, so I turned key off and tried again and it started. It always starts, just takes a few seconds, but once running it runs great. any ideas?

[fasterblaster09]

come on, need some help lol

[fastredrider44]

Check your fuel pressure, as in the pump may be on its way out. Also, has it had a tune-up lately? Plugs, wires, air filter, etc?

[fasterblaster09]

Im not sure on the last tuneup beings how I just bought it. I didn't notice anything ot of the ordinary with the gauge. I will double check though.

[Thumpin440ex]

Put a new fuel filter in, also check the fuel pump. It is prob the orig pump.. Easiest way to do a pump is take the bed off.. It is a pita *** to do one if you have to drop the tank, don't have access to a lift... Its one of the 2.. Also run some fuel system cleaner through it for good measure..

John

[fasterblaster09]

I priced a fuel pump, it is $271 :eek2: . That is from oreilly, said they dont sell just the pump, its the whole assembly. How can I check it? My bddy said he thinks its not priming, would this mean just the priming part is bad, or would that affect the whole operation of the pump? thanks, neil

[dns1764]

did everything turn on but the starter didnt spin? my truck just did that to me last week...wireing to the starter fried and it killed the starter itself...not cheap but what else do you expect form a ford

[fasterblaster09]

no it was spinning and everything. found a complete fuel pump on ebay for $65 shipped, whooohooooo. But I dont want to change it and it still stall to start.

[fastredrider44]

IF it's the fuel pump, definately pull the bed rather than drop the tank. But if you take your truck to someone that knows what they're doing, you could test the fuel pressure, on the injector rail. But the fuel filter is a cheap, easy thing to replace, and could very well be related.

[fasterblaster09]

im 99% sure that the guy told me when I went check it out that he had a brand new fuel filter on it, so now Im thinking that the reason he changed it was to fix the "problem". So I didn't know about it until the next morning when I went to start it.

[TCracin440ex]

you need to keep fuel in them. i try to keep atleast a quater of a tank in my rig because if you let them run low on fuel it will cause the motor in the pump to burn out. i learned the hard way it costed me 278 from autozone to get a new pump.

[fasterblaster09]

thanks for the tip, I guess ill go ahead and order a fuel pump off of ebay before it leaves me stranded. there goes my extended swingarm :mad:

[Thumpin440ex]

All you have to do to see if the pump is priming, is is to turn the key to the acc position,( like right before it will crank, listen for it to buzz-prime) If it doesn't it is more then likely the pump


John

[fastredrider44]

It won't come on in the ACC position. Turn it to on, but don't try to turn it over, and listen. It should come on for a few seconds. Also, you can listen to irregularities in the pitch if you are familiar to what it is supposed to sound like.

[JDiablo]

return or returnless fuel lines back to to the tank?