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New owner, truck starving for fuel

Old Feb 15, 2010 | 02:58 PM
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Exclamation New owner, truck starving for fuel

I have a 96 Ram 4x4 with the 5.2 318 that i just bought three days ago and drove it it over 3 hours home with no problems. When i got it home it started to cut out on me and died the very next day. Found out the fuel pump was out so i changed it. Now upon re firing the engine it stalled immediately and has done the same since. I know it's a fuel problem cause if u feed it gas through the TB it will stay running fine. I have replaced the IAC, TPS, and the crank sensor is new cause i have a reciept from the previous owner and i also checked it and not a scuff on it. I have checked and swaped all fuses and relays and checked all connectors, looked for leaks and pinched lines. would a scanner help even though i have no codes showing via check light? anything would help right now don't want to take it to the shop and have it cost me a fortune.
 
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Old Feb 15, 2010 | 03:25 PM
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Find a part store and rent a fuel pressure gauge and see how much fuel pressure your getting, should be something like 42-50lbs. of pressure in the line.
 
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Old Feb 15, 2010 | 03:46 PM
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But with new pump u would think pressure would be fine. Unless something else dictates that.
 
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Old Feb 15, 2010 | 03:55 PM
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Originally Posted by shibbyman22
But with new pump u would think pressure would be fine. Unless something else dictates that.
True. But like anything else, it could be bad of the shelf. By testing and confirming proper fuel line pressure it rules out the pump. Or you have a clogged fuel line somewhere but the truck ran fine until you brought it home so I doubt something is clogged.
 
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Old Feb 15, 2010 | 04:05 PM
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did you change the fuel filter when you did the pump? bet that things plugged solid
 
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Old Feb 15, 2010 | 04:08 PM
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Originally Posted by Maxx_Magnum
did you change the fuel filter when you did the pump? bet that things plugged solid
The fuel filter is integral with the pump. You can not replace it separately.
 
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Old Feb 15, 2010 | 04:20 PM
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so these trucks don't have an inline fuel filter? what the hell, Dodge?

I had no idea about this
 
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Old Feb 15, 2010 | 04:31 PM
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Yes he is correct the filter is on top of the pump and i checked fuel presssure at 48psi
 
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Old Feb 15, 2010 | 06:54 PM
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So its got good fuel pressure, the important sensors have been replaced but don't run unless your manually feeding it gas through the TB....umm maybe a clogged fuel rail or injectors but what don't make sense is it ran fine prior to it all...I got no more ideas at the moment
 
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Old Feb 15, 2010 | 07:58 PM
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consider this - i understand you to say that the truck will initially start, but then stall, unless you manually dribble/squirt fuel down through the throttle body. i'm thinking that something is tripping the ASD (auto shut down) system.

leave the fuel pressure gauge attached to the test port, and monitor fuel pressure at the initial start, as well as when it has stalled. i'm thinking that your getting initial pressure, it starts, then the ASD trips, and it runs out of fuel. this will show on the gauge as low to zero pressure when it dies.

if so, this might have been your initial problem, and you don't want to hear this - but the fuel pump might have been ok. if so, a lot of things can trip the ASD including crank position, cam position, etc. you'll need more help that i can give you there. it'll be a good question for mckenna.
 
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