Engine problems

Kevin zellweger · May 28, 2006

Hi all

it's been awhile since i posted, mainly because of the awesome info through the searches. But i havn't found an answer to this one yet.

The other day i drove to the hardware store its about 2 miles away i parked it came back about 15 min later started it up put the truck in drive and it bogged down below 500rpms and when i pressed the pedal nothing would happen, so backed up a little it still was bogging down, i put it in park got out popped the hood, it was running good i gave it some rpm (over 1500) got back in and drove away, then it did the same thing about 5 mins later at another location and then the engine light came on about 1.5miles later.

so i cleaned the intake, the air filter checked the plugs and wires pretty standard stuff and it all checked out ok, test drive light went off. two days later downtown light comes back on so i went to dealership and had them read the code and the mechanic said it was the fuel sender ( i had problems before with the gauge misreading but thats it) the mechanic cleared the code and a couple miles later it came back on. yesterday it did the same thing as when i was at the hardware store, otherwise it runs awesome, i did notice one thing once the engine goes above about 1200-1400 rpm it will not bog down later

I am wondering if the code is for the fuel unit in the back (the whole assembly) or just the fuel sender? i hate to be stuck somewhere because of a fuel pump.

I have added fuel cleaner (the two part BG) many times with no real improvement. and the fuel pump isn't whining like i have heard on some other trucks.

any help would be appreciated

Thank you (sorry for long post)

snoman · May 28, 2006

Check/change fuel filter and check fuel pressure as I feel your problem is in filter or pump. The pumps are cooled and lubed by fuel in the tank and when they reach end of life cycle that can cause variuos problem including yours. Most do not realize either that running tank low a lot with todays fuel prices can greatly shorten pump life as I read from time to time about someone that has gone through 3 or 4 of them and cannot figure out way and never realized that you need to keep fuel in them and not run them low all the time.

asepgrad98 · May 28, 2006

check fuel pressure regulator and change the fuel filter

Kevin zellweger · May 30, 2006

I bought a filter and a fuel pressure guage today, checked fuel pressure when i trun the key to run it goes to fifty then slowly declines to 48 and holds. when i start it the gauge moves up and down from about 46 to 52 at idle, with a little more rpms about 1500 the gauge moves up and down rapidly from as low as 40 to high as 60.

I am going to change the filter when i get a chance, but this will be the third fuel filter and when i opened the last two they where clean. regulator is the next thing to check.

Thanks guys

snoman · May 30, 2006

I bought a filter and a fuel pressure guage today, checked fuel pressure when i trun the key to run it goes to fifty then slowly declines to 48 and holds. when i start it the gauge moves up and down from about 46 to 52 at idle, with a little more rpms about 1500 the gauge moves up and down rapidly from as low as 40 to high as 60.

I am going to change the filter when i get a chance, but this will be the third fuel filter and when i opened the last two they where clean. regulator is the next thing to check.

Thanks guys

<{POST_SNAPBACK}>

My guess is that the pump is dying.

Rammer · May 30, 2006

Fuel Pump Pressure for the 2002's. I think it's the same for the 2000 model year also. I believe you check this at idle with the vacuum line disconected from the regulator.

Except Vin Z 55-62 psi

Vin Z 48-54 psi