Truck won't start after fuel filter change.
11-06-2005, 08:40 PM
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Truck won't start after fuel filter change.
I posted a query a couple of weeks ago about a '95 that was losing prime overnight. Ran fine after it was started, but might take a minute to start. A few of the suggested fixes were the lift pump going out, fuel filter change, and fuel line sucking air. I can't see any leaks any where. After I put a new fuel filter on yesterday, it attempted to start then acted like it was out of fuel and died. I bled the system using the bleeder screw on top of the fuel filter. No change. I loosened the lines to the injectors and fuel is not getting that far. I loosened the fuel line coming in to the injector pump and I get fuel if I use the hand pump on the lift pump, but not if I turn the motor. I removed the new filter and it is full of fuel. Not sure where to go from here. Lift pump gone? If it's gone, would the manual side still work? I've notice the fuel shutdown solenoid is hot! Is that normal even when the motor will not start? The solenoid is moving, any chance it could be bad and still move correctly? I'm pullin' my hair out on this one folks.... Closest Dodge dealer with a diesel tech is about 30 miles away. Anybody in the neighborhood? :-)
11-06-2005, 10:25 PM
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FYI, in most cases with leaking supply or return lines, you WONT see leaking fuel. The fuel lines degrade and develop very tiny holes that let air into the system.
If you havent replaced them - its time - whether this is the problem or not.
www.fostertruck.com has some very good replacement line.
If you havent replaced them - its time - whether this is the problem or not.
www.fostertruck.com has some very good replacement line.
11-06-2005, 10:42 PM
#6
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If ur not getting fuel to the injectors,
Maybe ur lift pump is bad. It could be the lines once again, and i could be wrong, in this case i hope that I am.. But, it strikes me as weird that u arent getting fuel, what is the mileage on this truck? any ticking noise from the lift pump? The P7100 rarely fails, so i doubt its that... lift pump failiures are uncommon as well, so it would be my guess, if it aint the lines, then id look into that..
Tx
Maybe ur lift pump is bad. It could be the lines once again, and i could be wrong, in this case i hope that I am.. But, it strikes me as weird that u arent getting fuel, what is the mileage on this truck? any ticking noise from the lift pump? The P7100 rarely fails, so i doubt its that... lift pump failiures are uncommon as well, so it would be my guess, if it aint the lines, then id look into that..
Tx
11-06-2005, 11:14 PM
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If the fuel filter filled, the lift pump is working.
Often, you have to hold the pedal to the metal to get the pump primed and delivering fuel to the injectors.
The solenoid draws a lot of current if the plunger doesn't fully lift.
Test it by turning the key on and then get under and lift it by hand. It should hold in place at fuel on position (full up).
Changed the overflow valve?
Often, you have to hold the pedal to the metal to get the pump primed and delivering fuel to the injectors.
The solenoid draws a lot of current if the plunger doesn't fully lift.
Test it by turning the key on and then get under and lift it by hand. It should hold in place at fuel on position (full up).
Changed the overflow valve?
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11-07-2005, 09:28 AM
#8
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If you have been trying to start it repeatedly it's likely the battery charge is way down. Even though it turns over it won't start unless the engine is spinning fast enough.
Put it on a charger.
Put it on a charger.
11-07-2005, 01:24 PM
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Manually pull the shut down solenoid all the way up when cranking.
Crank at WOT, untill it fires.
Unplug the grid heaters, shoot it with some ether to get the RPM up higher.
Give those a try, and report back.
Merrick
Crank at WOT, untill it fires.
Unplug the grid heaters, shoot it with some ether to get the RPM up higher.
Give those a try, and report back.
Merrick
11-07-2005, 01:43 PM
#10
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Originally Posted by Fueling around
If the fuel filter filled, the lift pump is working.
Often, you have to hold the pedal to the metal to get the pump primed and delivering fuel to the injectors.
The solenoid draws a lot of current if the plunger doesn't fully lift.
Test it by turning the key on and then get under and lift it by hand. It should hold in place at fuel on position (full up).
Changed the overflow valve?
Often, you have to hold the pedal to the metal to get the pump primed and delivering fuel to the injectors.
The solenoid draws a lot of current if the plunger doesn't fully lift.
Test it by turning the key on and then get under and lift it by hand. It should hold in place at fuel on position (full up).
Changed the overflow valve?
Isnt the fuel filter supposed to have diesel in it when you go ahead and put it back on truck? Hence my guess for lift pump is dead. Ive never ever had trouble starting my ram after a fuel filter change. I just give it a lil pedal when i bop the key and it goes. Ive never needed ether either, nor messed with grid heaters. Perhaps ive been lucky.
Try Merricks idea, if that dont work?
ID say you might have wayy too much air in system and bleed it out somehow..
Tx
11-07-2005, 05:05 PM
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I've always used the manual levver on the lift pump to fill the filter after I've put it on the truck. Never have had an issue. Would air in the line cause it to stop flowing fuel from the filter to the injector pump?
11-07-2005, 06:38 PM
#12
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Originally Posted by steverctx
I've always used the manual levver on the lift pump to fill the filter after I've put it on the truck. Never have had an issue. Would air in the line cause it to stop flowing fuel from the filter to the injector pump?
11-07-2005, 08:48 PM
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Originally Posted by TxDiesel007
Perhaps im mistaken here
Isnt the fuel filter supposed to have diesel in it when you go ahead and put it back on truck? Hence my guess for lift pump is dead. Ive never ever had trouble starting my ram after a fuel filter change. I just give it a lil pedal when i bop the key and it goes. Ive never needed ether either, nor messed with grid heaters. Perhaps ive been lucky.
...Tx
Isnt the fuel filter supposed to have diesel in it when you go ahead and put it back on truck? Hence my guess for lift pump is dead. Ive never ever had trouble starting my ram after a fuel filter change. I just give it a lil pedal when i bop the key and it goes. Ive never needed ether either, nor messed with grid heaters. Perhaps ive been lucky.
...Tx
The primer button is just for that purpose.
11-08-2005, 07:04 AM
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Originally Posted by Dr. Evil
FYI, in most cases with leaking supply or return lines, you WONT see leaking fuel. The fuel lines degrade and delelop very tiny hose that let air into the system.
If you havent replaced them - its time - whether this is the problem or not.
www.fostertruck.com has some very good replacement line.
If you havent replaced them - its time - whether this is the problem or not.
www.fostertruck.com has some very good replacement line.