Hello everyone,

it seems that i have some issues in my H1 (6.5 non turbo) , here is the story :

- i drove it yesterday around 200 miles and i noticed that the speed goin down badly in the heights it jumps from 70 to 50 and i think that the transmission doesn't shift back from 4th to 3rd gear, any ideas ?

- when i reached home i started it again after an hour, i didnt hear the fuel pump sound and the wait light keep flashing but, the engine starts. when i drove it like 100 feet then suddenly the engine turned off ??


Thx,

 

Sounds like a fuel delivery problem. When my 94 is warm I don't get the wait light. Lots of things you can check but first thing I would do is take the fuel filter out and inspect it. You can see if the filter needs to be replaced while checking to see if the filter canister is full. If it isn't your lift pump isn't working. That could be anything from a bad pump, to electrical connections, etc.

 

i'll check the fuel system today and i'll feed you back

Thx

 

i checked the filter and its clean, where i can find the fuel pump fuse or relay .

 

Was the canister full of diesel?

 

Lift Pump Testing Procedure

This is from the Hummer Knowledge Base at Humvee.net

 

the canister is not full, and i removed the lift pump and i tested it with 12v and i didnt hear it running.

 

Seems like you found the problem. At least they are pretty cheap and easy to replace.

 

i want to know the fuel movement sequence

fuel tank to lift pump to fuel filter to >> ?

 

i just installed the pump and new relay and its running perfect now

3hummers ,,, thank you a lot