Engine/Transmission (1994 - 1998) 95 2500 troubles

[mazdarotary]

Hello guys,



My brother-in-law has a 95 Automatic 4wd 2500 reg cab diesel,and is having issues with it recently. The symptoms are it sputters,and dies when he lets off of the accelerator pedal when the weather is warm,and the truck is climbing hills or towing. The truck vibrates like on a washboard road when this happens as well. After it dies he can start it back up without trouble,and it is fine for a while. EGT temps drop when it acts up,and the problem is very intermiten. The fuel filter has been changed recently. Non of the other gauges read anything but normal when this happens,and he can't figure out what is causing the problem. He says it is like with a gasser with a spark plug wire removed when it acts up. Any ideas?Could it be a fuel delivery problem?Could his fuel pump be acting up?Is the fuel pump mechanical like my 1st gen?Could it be injector pump related?I think he is fed up with the truck,and may turn to the dark side of GASSERS!!!!!!!!



Help!!!

 

[Joe G.]

It sounds like low fuel pressure to me. Most likely an air leak somewhere. If the fuel hoses have not been changed they are prime suspect. Do some trouble shooting to find the problem before buying parts. These are the candidates in probability order:



Fuel supply and return hoses

Overflow valve spring less than 1/2" long

Fuel heater

Fitting on top of fuel heater

Pre-filter and fuel heater gaskets

Fitting on input to fuel filter

Curved hose between pre-filter and lift pump

Sticking fuel solenoid

Lift pump O-rings

Lift pump



I have most of these things happen to my '95 except that the lift pump, the curved hose, and the sticking fuel solenoid. They are still the originals. Most of this stuff is cheap to fix, but may take some work to find.



Of course, it could be a plugged fuel filter if he got some bad fuel or has not changed the filter in many moons.

 

[Reb.B]

Sounds to me he needs to raise the idle. If its was the lift pump or sucking air before the lift pump it would not want to start back up.

 

[Joe G.]

Could be the idle. When my idle gets low it just quits in that situation. My truck acted a lot like he discribes when I had an air leak in the fuel heater. It wasn't much of a leak so it started ok. When I pulled the electrical connector out that killed it and it would not start. I should have included low idle in my list of possablities.