what the hecks wrong with this 24v please help

S

smokin06

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My buddys 2001 24v automatic, he was driving the other day and it just quit, we ordered a brand new injection pump, put it on and nothing we aerent getting any fuel, the transfer pump is fine we checked it and even changed it out and the same thing. Can it be a computer problem. one or 2 of the injector lines were getting a little fuel but the front couple have never got a drop of fuel out of them. what the crap could be the problem, thanks allot for the help in advance.
 
Make shure your pulling fuel from the tank. Then bleed off the filter housing , then injection pump, then lines.
 
we tried all that its weird, im gonna work on it here today, try to diagnose the problem, thanks guys so theres no way theres a computer problem.
 
Could be the ecm or the pcm, but its a shot in the dark changing them. best to find anoher thats the same and swap them.
 
Could have a lot of air in the system. I would continue making sure the fuel system is primed, crack the fuel line at the injection pump, then crack the fuel lines at the head (try to get fuel out of all 6 lines, though not necessary), and if you still cant get it to fire, try hitting it with a shot of ether (un-hook the heater grid just to make sure its not cycling). I have had so much air in the system at times that the only way I could get it going was ether. Let it run for a while, tighten it all back up, and drive it.
 
I have seen this before dont EVER do this on a regular basis but get the truck started with starting fluid and it should be fine. i have seen so much air in the system that we spent an hour trying everything to get the air out after a new injection pump install and finally we started it with fluid and it was fine.
 
CL2000 said:
Maybe its out of fuel I have seen this way to many times
Click to expand...

Thats funny u say that. My pump went out and when I installed the new one I couldnt get it to start. I was showing 1/4 tank. Pulled the supply line to the injection pump and had no fuel. My shop slopes three inches from the back to the door so I jacked the truck up level ( it was facing the door) and what do you know I had fuel. Fired right up. That was the day I found out my fuel gage was off 1/4 tank. Before anyone askes the pump I pulled off was bad. Electronics were bad.
 
Check the fuel pump relay under the hood. I could make a buddies truck shut down and not start just by wiggling that relay. Had loose connections underneath.
 
try all that was suggested, but I'd have to look real hard at the ECM, mine died twice before I said piss on it and installed a P7100

one ECM would cut out occasionally, the other one stopped running the guages one by one, and all of a sudden it just died, VP44 was still good.
 
Thats pretty rare for two ECMs to be 'bad'. Interesting though!
This is what I was taught about electronic faults and where the problem is: Harness 90%, Sensor/actuator 9%, ECM 1%
 
yeah but I have a special kind of ****ty luck, according to that maybe he should be looking at the harness and doing some testing.
 
01 smoke said:
Thats funny u say that. My pump went out and when I installed the new one I couldnt get it to start. I was showing 1/4 tank. Pulled the supply line to the injection pump and had no fuel. My shop slopes three inches from the back to the door so I jacked the truck up level ( it was facing the door) and what do you know I had fuel. Fired right up. That was the day I found out my fuel gage was off 1/4 tank. Before anyone askes the pump I pulled off was bad. Electronics were bad.
Click to expand...

Yep that is how I have seen it and its pretty common

cetanefreek said:
try all that was suggested, but I'd have to look real hard at the ECM, mine died twice before I said piss on it and installed a P7100

one ECM would cut out occasionally, the other one stopped running the guages one by one, and all of a sudden it just died, VP44 was still good.
Click to expand...


I have seen this on 1 truck in 5 years
 
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