Engine/Transmission (1994 - 1998) Engine problem?

[relong1]

I have a 95 Ram and have a problem when the engine gets warm. While going down the road it will start to clatter (which I assume is the injector pump) and then starts to slow down. The gas peddle sticks and and it runs rough like it is missing on some cylinders. It is similar to running out of fuel. Some times it dies and other times it will take back off again. When it dies it usually starts right back up. I have replaced the fuel pump, overflow valve, taken the fuel heater a part and found no problems. The fuel lines were replaced approx. a year a go and still look good. It runs great when cold and always starts right up. It has 110k miles on it and I have never had any problems with it. I am stump and would take it to a Cummins deal if there was one very close. Any suggestions?

 

[DieselMinded]

Possible injector problems



have some one check the injectors



or just BOMB it and get 2 for 1.



DM

 

[AMcKee]

Im no expert, but you may want to see if your shutdown solenoid is coming up fully. It may need to be cleaned or replaced. My truck had similar symptoms, I replaced the shutdown solenoid and have had about 8k problem free miles. If you need to replace it Im pretty sure Piers has the best price on them. If im barking up the wrong tree feel free to correct me you Yoda's of the diesel world.



Andy

 

[relong1]

I wired the shutdown solenoid open and test drove it, but it still did the same thing.

 

[JTeague]

I have had 2 different trucks with the same symtoms you describe. 1 was a 94 and the other was a 95, both were 5 spds. You could drive them for a bout 10 to 20 miles at 70+ MPH and they would start dropping cylinders and eventually loose all power and sometimes die until you either shut the engine off or just let it idle for a while. Then you could drive again with no problems and it would start to miss after a few more miles. I Checked the fuel pressure while driving and was good (between 25 to 30 psi) and ended up replacing the injector pumps on both trucks to solve the problem. Seems they had a problem with the earlier P7100 pumps doing this.

 

[JGK]

Per DieselMinded, I'd check injectors first. That would be the cheapest. Can you determine if its a specific cylinder or two? If so, swap injectors around to see if it moves with injectors. If you can't determine, perhaps someone has a set of stock injectors they'd send you for testing purposes (I don't, unfortunately).



Next step - pull the injection pump and have it bench tuned (?)



What you describe seems pretty odd and you've checked most of the obvious/easy sources.



-Jay

 

[crabman]

relong1,

Did you replace the small fuel line between the pump and the fuel heater?

Next time it happens, stop and take off the fuel filler cap and see it you hear a hiss when you unscrew it. If it does, then check to see if the vent/valve on the fuel tank is plugged with dirt.

It is werid that it only does it when it is warm .

If you find the problem, please post the "fixed-it" so we all can learn something.

crabman

 

[onestackdram]

other than the gov. spring kit what else have you done to the pump? i. e. have you changed delivery valves? if not have you have ever pulled the d. v holders loose on the pumps itself (these are where you lines come out of the pump and go to the inj. ( i don't mean that to sound condesending)) if the answer to these ?'s is no then go to the inj, and swap them around and see if the 'miss' follows them like said before. But my thought is that it is not in either of those problems it may actually be deep in side the pump, or prior to the pump and between it and the tank. I am wondering if it is not that it's just because the engine is warm other than it is more a matter of 'time' when the problem occurs, I don't know you would have to tell us.



Russell

 

[JAmos]

Have you changed the fuel filter? Even if you have recently you might try again as its possible that you got some dirty fuel. It sounds suspicious of a plugged filter since the longer the truck runs(warms up), the more dirt gets pulled into the filter-choking off the supply of fuel to the engine. Junk in the bottom of the tank could also act like a plugged filter, since the longer the engine runs, the more crap it will suck onto the fuel supply screen in the tank.



Also what is your timing at? Just got my timing fixed and I couldn't believe the difference it made. I thought that I was going to have to get the pump rebuilt because I began to have so many random problems that changed daily. It was really weird. Some days it would smoke so bad at start-up that I had people ask we if it was on fire, other days it would start fine. Some days when driving it would start to cut out and pop and spew white smoke, then other times it would be fine. It got to be really embarrassing to drive cause I never knew how it was going to act.



Really starting to shoot in the dark here but if the fuel/water drain on the bottom of the filter is stuck or gets sucked up a bit? Maybe try running some fuel additive and see if it cleans up some deposits or buildups? Just my 38. 5 cents worth.



Jordan

 

[dodge cummins]

if your looking for injectors i saw stock injectors on ebay yesterday.

 

[Joe G.]

relong1,



You need to put a fuel pressure gauge on it so you can get some idea what is going on when it acts up. This is just a bunch of guesses. Need some data. If you have good fuel pressure then it is the pump or injectors. If the pressure drops then look at the fuel filter and the many possible places for an air leak that is worse when the engine is warm.

 

[relong1]

I did put a fuel pressure gauge on it after I replaced everything and had plenty of fuel pressure. So I'm convinced it is not anything to do with the fuel delivery system. Everything is pointing towards the injector pump. I'm going to take it to a cummins shop next Monday. I'll post what they find out.



Thanks for the help

 

[relong1]

A quick update. I got my truck back from a Cummins garage and they found bad delivery valves. They said they were sticking when it warmed up. They replaced them and adjusted the pump on a flow bench. The truck runs harder than it ever has and smokes less.



Thanks for all the help

 

[JAmos]

Glad to hear its running great. Have fun.



Jordan

 

[TPCDrafting]

I had people ask me if it was on fire,

:-laf :-laf I thought that's how you liked it Jordan?

 

[Ben Rumson]

Have you changed the fuel filter? Even if you have recently you might try again as its possible that you got some dirty fuel. It sounds suspicious of a plugged filter since the longer the truck runs(warms up), the more dirt gets pulled into the filter-choking off the supply of fuel to the engine. Junk in the bottom of the tank could also act like a plugged filter, since the longer the engine runs, the more crap it will suck onto the fuel supply screen in the tank.

Jordan

I AGREE.



- Ben

 

[JAmos]

:-laf :-laf I thought that's how you liked it Jordan?

I love the black coal, not the stupid lookin white stuff that I had problems with. I want to get my hands on some laser cut delivery valves when I can afford to. Bring on the smoke!!!!!!!!!!!!!!!!



Jordan

 

[Nyle]

sounds like pretty much the exact same problem i've got... . maybe its time to go to Great Plains... .

 

[fortunate1]

relong1:



Glad you got to the bottom of this. The '95 has "131" stock delivery valves; did the Cummins shop replace yours with more new 131's? Or did they super-size you with 181's or 191's? What was wrong with your original dv's that made them stick when warm? This may help others with '94 and '95 engines should the same symptoms appear.



Phil