Injector pump rebuild problem

[bbilt]

I have a 1992 Dodge cummins 4x4, had the pump rebuilt. Went to a highly recommended shop. Got the truck back, runs OK but I'm only getting 10 MPG now was getting 16 MPG. Waiting to hear back from the shop. What happen? What did they do to my truck? Any ideas or what to ask them.
Thanks
Bill

 

[DVolk]

What shop did you go to I got a bad pump from DCP back east , also did you change your fuel filter ?

 

[bbilt]

DVolk
I'm giving the shop a chance to reply and fix the problem. Yes a fresh fuel filter.
Thanks for the reply
Bill

 

[Bob4x4]

Did they time the pump when they did the install

 

[bbilt]

Bob4x4
I asume so as it run ok, not the pep my 93 has with twice the mile on it.
Thanks for the reply, Still waiting for their reply.
Bill

 

[MMeier]

Was the pump and timing stock before?

 

[RWherley]

Its possible they adjusted the star wheel wrong, when I misadjusted mine the truck ran fine but was down on power and would only rev to 1800rpm.

 

[bbilt]

Injector pump rebuild problem UP DATE

I took the truck back to the shop 12/15/2014 & told them to drive the truck and see. They have been checking things ? I sure wise I had my truck back ( its not my daily drive ) Any ideas, they seem to be at a loss. I want my 16 MPG back. Is that too much to ask for? What do you get in your trucks?
Thanks
Bill

 

[DVolk]

i get over 20 in my 92

 

[DonFitzwater]

None of my old 1st gens got that bad of fuel mileage......most were high teens.

 

[JLEONARD]

Sounds like the timing may be off. I would make them go thru the process again even if they are sure it's correct.

 

[Bob Beauchaine]

Did you do the pump install or did they? They have had the truck since 12/15/14 - that is six weeks or am I missing something? The truck and the pumped have to be timed together when the pump is installed back on the vehicle.

Bob

 

[bbilt]

Thanks for the replys, Before the rebuild 16 MPG after they installed the rebuilt pump and got it back the milage went down to 12-13 MPG. Took it back they did some adjustments and it went down to 9 MPG. Took it back again, they're checking everything the trans, rebuilt pump,and there OK, They wanted to replace the injectors, I said OK but if it didn't fix it I wasn't going to pay for the new ones. The injectors stayed. Joe is driving it around and it running fine, but he can only get 13.6 MPG. I/they need the diesel wizards help. I want my 16 MPG or better if possibe. The truck only has 100,000 mile on it.
Thanks
Bill
San Diego CA

 

[MMeier]

Did they actually retime it like was pointed out above, sounds like you may have to take it to another shop that knows what they are doing .

 

[AndrewKing]

HI,

I would guess timing first and after that blame a faulty rebuild or a bad job putting stuff back together (i.e. getting dirt in the lines or even doing something to let air seep into the system).

Running empty (unless you are doing a lot of idle time) there should be no reason to get only 9 MPG....heck that's gasser territory!

Just curious but what "adjustments" did they do to get you from the 9 MPG mark up to 13+ MPG ? Whatever they did maybe they need to do it more to get the MPGs up...

On the flip side was it warm before your rebuild and cold after the rebuild? (weather / fuel can account for some loss in MPG's).

Hope this helps,

Andrew

 

[DonFitzwater]

Is this engine inter cooled?

 

[Bill Stockard]

Is this engine inter cooled?

It should be if it's still original. '92 Dodge CTDs were intercooled from the factory.

Bill

 

[DonFitzwater]

I couldn't remember when they started putting intercoolers on the,..........have they checked the charge air side for air leaks?

 

[JLEONARD]

Is there ANY smoke? If so what are the conditions and what color is it?

 

[bbilt]

Yes inter cooled