I am co-owner of a 1994 3/4 ton 4wd cummins, auto trans. My partner went through high water and abandoned the truck with the engine running submerged to the headlites. It was in rushing water 12 hours.We have had everthing flushed. Here are the problems:
The tranny will not shift into 3rd gear.
The engine ran fine for a week, now it will not start. One mechanic in town says the injector pump is bad. He gets fuel to the injector pump, not to the lines going to the injectors.
Found water in the filter/separator
Loose steel line from lift pump to injector pump.
I have always heard these inline pumps were bulletproof.
Any advice? This garage is not a diesel shop.
I also found out that Starting Fluid has been used on this motor.

 

The P7100 can break I broke one. If it were submerged in water well im not sure what would happen. I would crack an injector and see for yourself. And I would take it to someone who knows diesel injection pumps. As for the trans i think your gonna need a rebuild. How long did it stay running? oh and

 

This thread should be moved to the diesel in distress for better exposure,,, guys want to take care of that........ and welcome to the DB....

 

good catch kido

WOW.......you need to get it to a diesel shop for better service

I say crack the injector lines and see if the P-7100 can pump

 

Be very careful doing so - never put your hands (or anything else) around a cracked injector line - use cardboard to check for fuel.

 

Never ever use stick anything but cardboard or white regular bond in this area when checking for fuel - using a hand or a rag with your hand will (not might) result in loss of fingers or the hand itself.

The pressures will cut like butter. It gets ever worse as the trucks get newer.

 

Yeah...isnt the pressure on the common rails around 20 000+ psi?

 

Eh something like that

 

27000 psi is stock I think and if you run bigger stuff and a box it can climb to 31000 if I'm not mistaken.

Think about that for a second 1000 times more than 20 or so pounds per square foot. Most floors in buildings are designed for between 40 and 100 pounds so that puts it into perspective.

 

Just out of curiousity why didn't your partner turn the truck off before bailing out? takes a split second ...