First off I want to apologize for asking so many idiotic questions but I have never messed with a diesel in my life, but anyways I have noticed when I drive my truck a few miles it will "power surge* (Rpms go up like I hit the throttle when I don't) and it is slow starting it will crank for a few seconds before turning over amd i have to pump the gas pedal and the guy I got it from said the lift pump or inline fuel pump whatever its called needs replaced and I have a check engine light on and the guy Aldo told me it is because of the lift pump, is he right? I have bought a nre inline pump(I guess lift pump) snf I haven't had time to replace it yet so I need to know if this is the problem will what I have fix it or is it something else? Any help is greatly appreciated

 

It would be a good Idea to get the codes pulled and that way you will know whats what with the truck but a bad LP will cause truck to surge and if it is a bad LP It will put extra wear and tear on the IP

 

*2

Faulty PMD's can also cause a surge but 1 problem at a time is best to solve.
post #4 here covers a lot:
https://www.dieselbombers.com/chevy-...tml#post682318

 

Yeah, I had to splice a wire on my PMD's extension cable and didn't have enough wire around the connection to get a good crimp so every once in a while I will loose all power and get thrown in my seat a second later, put in the clutch and the rpms jump all over the place. Wiggle the splice and the thing works perfectly fine again. After putting on the new LP, might want to check the connections and locations of the PMD, stock its on the IP, but there are relocation kits that get it away from the heat zone.

 

Look into the lift pump first and see if it is pumping good. On my 97 Suburban I had surging happening and it ended up being a bad PMD. But I also developed the other bad PMD conditions like stalling and no restarts etc...

Good luck and let us know what is going on so we can help.

~GOD BLESS~

john

 

I will keep everyone posted on what's going on I think I'm gonna try to change the lift pump tomorrow does anyone have any suggestions on how to keep air out of the lines and what not? as I've said before this is my first diesel and I know absolutely nothin about em

 

I also have a new higher volume LP to install. Have not had time to do it yet but I have changed plenty of fuel filters which gets alot of air into the system. I usually have to let it prime itself then crank it for several intervals until it purges the air and fires off then you should be fine.
Do you have the Diesel manual for the truck? I had to buy two books an Haynes for the 2500 series and then an extra Haynes book for diesel motors from that time period. It has good stuff in it.

Good luck and let us know how you come out on your project today.

~GOD BLESS~

john

 

No unfortunately I do not have a diesel manual I don't have any manual for it besides the owners manual but unfortunately I will not have the time to get to it today like I had hoped, I wont get off work in time, and tomorrow I'm booked all day so as of now I'm looking at Sunday being the earliest ill be able to get to it (no I'm not driving the truck I'm driving my 96 k1500 gas)

 

Most of the threads I have read about replacing the lift pump all suggest the same things:
- Have as little diesel in the tank as possible (less to leak out)
- Pull the fuel cap off before you start the process (just incase there is a vacum)
- Be ready to cap off the lines when you remove them and have a catch pan or extra rubber line to route the fuel away from you (Be creative - use a shop glove with some duct tape around the fuel line)
- Raise the fron of the truck a little may help keep fuel from the tank coming at you as much (So that the front of the truck is higher than the rear)
- Be ready to get a diesel bath (Hopefully not that bad)
- Work as fast as you can and remember to do a visual before you start to make sure things like line fittings and the plug will fit once replaced (Take your time with the threads - do not want to strip them)
- After replacing you will need to fill the fule filter which involves losening the filter bleed valve and running your new LP until fuel comes out (just like you would do on a filter change)
- Still may take a few cranks before it starts and then you are done!

Do a few searches on replacing the LP if you need more info.
~GOD BLESS~

john

 

Ok over got one more question, the LP I bought is an airtek (I know not so good but its what I could afford at the time) but I found an ACDelco and wanted to get y'alls opinion, should I stick with the airtek or go with the ACDelco?