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My 94 12 valve was running fine then I was coasting going down the road and noticed it was idiling at only like 450 rpm luckily I was close to my house then going down the road it died coasted it to my house and it would only start with my foot on the throttle then it just completely quit running. Took the fuel filter off and it seemed fine. Was full of fuel I dumped it out and tried to re prime it and I won’t get any fuel ever time I hit the water drain on the filter I just hear air coming out. Where should I start to look to get it fixed?
 

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I would start looking at the fuel lines for one that's bad, how much fuel is in your tank?
 

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Fuel prefilter clogged?
 

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Run a fuel line from the LP to a jug of diesel and see what you get.
 
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Either that or your LP has failed, do you feel any resistance when your pushing the primer on the LP?
 
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Have you tried turning the truck over with the starter and the bleeder open with the line in the jug?
 

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Is the screen in the tank dirty?
 

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2015 Ram 2500, Longhorn Laramie LTD, 6.7L CTD
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Just tried that didn’t work but I noticed the line runs to the fuel heater to lift pump is kinked think that’s the issue
If your tank is drawing vacuum it might have caused the hose to collapse. With temperatures dropping this may well have accelerated the problem. Try taking the fuel cap off.
 

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Guy said he put in 4 gallons of diesel so the cap would have come off then. Possibly the fuel heater melted? Maybe try running a line directly from the LP into a can of diesel. Won't run long as it'll be pumping everything back to the tank, but could tell you something.

OP, how many miles on the truck? (really, how many miles on the LP?)
 

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Guy said he put in 4 gallons of diesel so the cap would have come off then. Possibly the fuel heater melted? Maybe try running a line directly from the LP into a can of diesel. Won't run long as it'll be pumping everything back to the tank, but could tell you something.

OP, how many miles on the truck? (really, how many miles on the LP?)
Would have come off, I guess i'm asking if he heard a slurping noise. The line wouldn't have kinked on it's own, it was just the weakest thing in the system when vacuum was applied and it collapsed, possibly saving the tank. If everything downstream of the kink is still under vacuum then it would still hold the kink. I think you'll have to make sure the tank is venting, then vent downstream of the kink before anything changes.

IMO, the vacuum condition probably originated because the tank wasn't venting.
 

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Is the fuel shutoff solenoid pulling up when you bump the starter?
 

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Guy said he put in 4 gallons of diesel so the cap would have come off then. Possibly the fuel heater melted? Maybe try running a line directly from the LP into a can of diesel. Won't run long as it'll be pumping everything back to the tank, but could tell you something.

OP, how many miles on the truck? (really, how many miles on the LP?)
Mine wouldn’t start sometimes because the fss was failing…with the key on I could pull the lever up where the solenoid attaches and turn the fuel on…once I pulled the lever up the solenoid would hold it but was failing to pull by itself because it was going bad so I deleted the fss and went to a manual choke cable setup…no more worries.
 

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Mine wouldn’t start sometimes because the fss was failing…with the key on I could pull the lever up where the solenoid attaches and turn the fuel on…once I pulled the lever up the solenoid would hold it but was failing to pull by itself because it was going bad so I deleted the fss and went to a manual choke cable setup…no more worries.
Failure to pull up is normally because of a bad relay. If it would stay up after you pulled it up it was not failing.
 
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