Here I am

Help...truck dies after driving a few miles

Attention: TDR Forum Junkies
To the point: Click this link and check out the Front Page News story(ies) where we are tracking the introduction of the 2025 Ram HD trucks.

Thanks, TDR Staff

All Smiles for Mgrant Too!!

Cryo treating??

Status
Not open for further replies.
Maybe some of you have had this dilema before...



I have been working out little bugs here and there and now the cummins seems to be starving for fuel after driving it for a few miles. I just resolved the rusty tank issue (coated the inside of the tank).



Sorry, a little background first...



As in the signature... the cummins resides in a 1978 Ford crewcab shortbed 4x4 pick up with dual tanks. One tank was boiled out and became rerusted. It caused me some grief because it kept on clogging up my little glass see thru inline filter after driving it for a mile or so. The other tank is clean as a whistle. I have the stock selector switch in the cab and that seems to be working well.

It is a California truck... so it had those gas vapor line(s) which go to each tank. I use these lines as return lines for the diesel now.

It is one line that tees off about half way between the two tanks.

I took another fuel selector solinoid and hooked it up where the return line tees and tapped that wire into the wire that goes to the other solinoid switch for the pick up fuel line. So the return fuel goes back to the tank which is being used at that time. Very similar to newer fuel injection trucks with dual tanks, except they use one solinoid switch for both fuel lines and return lines. I know I probably put quite a bit of stress on the lift pump due to my clogging the filter when I had the rusted tank.



Could I have damaged the lift pump or the main pump with my issues? I would say that I have only driven the truck about 10-20 miles since my fuel problems have arisen.



Are there any tests I can perform to check to see if either pump has any problems?



When I first go to drive the truck... everthing seems to be working perfectly... then after a couple of miles it seems to be starving for fuel. The motor gradually starts to die out. The one time when it completely died, after a minute or two I started it up almost immediately like nothing every occured drove back home about two miles and everything was fine. The next day I drove it about two miles and it started dying again as I was pulling up into our driveway.



Could this have anything to do with that solinoid or whatever it is on the fue pump with the wire going to it?



Any thoughts, suggestions or input would be greatly appreciated.



... Robert...
 
Are there any rubber hoses in your conversion that could be collapsing under the suction from the pump? Are the fuel lines adaquate for the cummins? Maybe tank vent or caps not venting for suction of the lift pump? What does the engine filter/water separator have in it?
 
so it had those gas vapor line(s) which go to each tank. I use these lines as return lines for the diesel now.



What other kind of venting does the tank have. On the gasser these lines would have been the vents. With you using them for return lines. I am wondering if you are building a vacuum in the tank.



Loosen a fuel filler cap and go for a drive.
 
I do not think there are any rubber hoses that are collapsing, but I will double check. most of the fuel line is metal, there are only a couple of "transition" sections of line which are rubber.



Is the lift pump any different than a fuel pump on a gas engine?



I would think they are very similar- both creating such via a lever moving on a offset lobe on the camshaft.



I just put in a brand new fuel filter on the cummins... so that should not be an issue.





... Robert...
 
A vacuum in the tanks is very possible. I will crack the filler caps tomorrow and go for a spin, thanx for the idea...



... Robert...
 
Status
Not open for further replies.
Back
Top