my 91 dodge cummins started losing power
 

my 91 dodge started loseing power on me,started smokeing then staled out,it will tern over no kick.give it some quick start and it goes and runs fine. i have a new electric fuel pump on it its a 7 psi 130gph. i changed the fuel filter tryed it agen it will go 3miles then start loseing power agen. i have a clean air filter on it as well. befor it only did it once and a while now its all the time i go about 3 miles. i took the top off where the tps is to see if there was dirt in there. it looked fine but the black plunger has a little cut in it i would say its the trouble but not sher.

fuel shutoff solonoid maybe:humm:

by black plunger are you talking about the fuel pin diaphragm... if your pressurizing the housing i dont see why you could force air past the rack pin into the pump itself causing it to act like it's gulping air... deffinately sounds like a lack of fuel for sure. whether it be from air getting in the system or as whitmore had said the fuel shut off solenoid is faulty

i was talking about the fuel diaphragm .ok how can i check if the solenoid is faulty?

with an ohm meter i have the dealer service bible in my 93 ill look it up tomorow & get back 2 ya bout it the reading it should be putting out & the proper way to test it

Here, Diesel power check this out, and welcome to DB guys.:U:
http://www.genosgarage.com/GenosGara...arageWWWMT.pdf

thanks guys