94 cummins wont start
#24
#25
Try pressing the manual primer button on the lift pump several times. It should firm up pretty fast if not immediately if it's working and the fuel system is fully primed. If everything is OK, you'll hear the overflow valve relieve the extra fuel out of the injection pump.
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another thing. will the fuel pressure gauge even help me if i cant even get it to start? im trying to get this fixed asap and without going out and buying stuff that i dont even know if it will fix the problem
Last edited by jonesy9310; 12-07-2012 at 10:23 AM. Reason: Automerged Doublepost
#26
I would try cracking the banjo bolt holding the overflow valve on the forward end of the injection pump loose or the bleeder bolt on top of the fuel filter housing (better option) and try pumping the lift pump again. If you get no fuel, you'll need to find out why, as in bad lift pump, clogged filter, no fuel from tank, bad fuel lines under intake manifold, etc.
#27
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#29
From what I have heard and been told about the fuel shut off the only time it does anything is when you start or shut down your truck. I was having hard start as well. I replaced my fuel shut off and block heater and the truck starts great after being plugged in. Being cold it starts and lugs I use to have to throttle it or it would die but now it lugs and stays running on its own. might be a starting point. I dont know much about the pumps but I know that they are super temperamental to air.
#30
if you turn key to "ON" position. soleniod will not pull up. only pulls up when starting, BUT, just pull it up with your finger. it should stay up, if it does.. that part is all set. it's fuel supply problem. did you clean "strainer/heater" under pump? i found mine to be totally gunked up. try that. if it's all clean, you got to start from square one. disconnect line fron pump to see if fuel is even comming out of tank. ( i had a friend who found out crap IN tank, was blocking supply). if line is all clear. it possably could be lift pump.
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JDCumminsGuy (12-10-2012)