First time posting here....I have a problem with my 1995 that has got me totally skunked. Here's the symptoms: Only happens in hot weather after driving at least half an hour or so. The engine "lopes" really badly at idle, or even when going downhill with engine under no load but some throttle; and sometimes (but not often) when driving over 65, a loss of power and then engine shutdown, but if I wait a minute it will start back up and I can drive again. I replaced the fuel filter and it got better, then 500 miles later same stuff. Replaced filter again, couple weeks later same story. Cleaned out pre-filter down by the lift pump, but it was pretty clean. I replaced the overflow valve, and.....same story. I am thinking a dirty fuel problem, but I don't see how a dirty filter would cause it to lope at idle, and yet be able to accelerate and run fine from idle. I am on my 4th filter now, should I buy them by the dozen? Oh diesel Gurus I beseech thee, HELP! This thing is driving me nuts...

1995 dodge diesel, auto, p7100 injector pump

 

Your question would be better served in the 2nd Gen. section of the site.

If you think it is a fuel problem, dis-connect the DRAW line at the tank, hook it to an electric fuel-pump, and pump until the tank is empty, depositing the fuel into a CLEAN open-top bucket(s) so you can actually see the fuel and whatever settles out of it.

Avail yourself of a MR FUNNEL water-separating fuel-filtering funnel --- the BIG size --- and slowly pour the fuel through it into a CLEAN fuel-can(s).

Pour this now-clean fuel back into the tank; add a healthy dose of fuel-cleaning conditioner, plus about two quarts of TC-W3 two-cycle engine oil; and, top off the tank with fresh new fuel and keep topping it off as soon as it draws down to 3/4-full.


Actually, on thinking about it, your situation reads like an air intrusion problem, usually caused by a rotted rubber fuel-line or a cracked draw-straw.

 

Oh yeah, and you should already be in the habit of buying fuel-filters in volume quantity.

I try to always have a couple dozen on hand, with three or four in the truck.

 

Judging on the symptoms I would start by checking for air in the system from the fuel lines at the rear of the engine. With the hotter temps sometimes the rubber will fail and crack. I would not think its a fuel quality issue at this point so changing filters so often is not going to fix it IMHO.

But also, the 1995 engines had a problem with warping of the fuel pump bores on the P7100. Unfortunately the only fix was the replace the pump.

 

do you still have a fuel heater? i wud delete that asap. if its not ur problem now it prolly wont be just too long b4 it is