the 2000 rpm test tells you if you have a good pump. its not a definite yes or no test but it sure helps because if it couldnt of done it then it would of probably been the pump failing but since it passed most likely not. if you plan on keeping this truck i would get a brand new pmd and mount it behind the bumper so it can be ruled out of the equation. did you clean the grounds? also after cleaning i would clear codes again and see what comes back.

Yes, it already has a bumper PMD and I replaced the unit as well.
It also has a back up one mounted there too just in case.

Grounds are all good now as far as I found so far.

Just keeps coming and going with the low power and light. I replaced the pump relay today as well.

ix-2 what woody35 said

Fuel filter only goes in on way just look at bottom of the cap and u see what talking about

Hu? where did that come in?
what the importance of the print on top of the filter housing and why does it need to be facing a certain way?
My print is gone :bat:

some filter don't gave you that info

ahh, ok.
I was looking at the manual and it had a picture and explanation that the wording on top of that housing had to be pointing a certain way or what not. So had to ask.

Your a mechanic I assume since you have allot of knowledge in the field.
I went through a diesel coarse years back but only work in a garage for a couple years. I got into some of the internals at times, but did allot of brakes and bearings and tires and PMs. But the trucks and parts was much bigger than this things parts, and was in different places I could get too, lol.... but it wont take long to figured it out. Its gonna be fun for sure.

I'm looking into a full air bag system, front and back..... and ideas for tank mounting and stuff?

Thanks for everything so far Crazy!

You say the light keeps coming and going did you recheck the codes to see if there all the same ?

Still cutting out
 

Ive had a chance to do some more tinkering and what I did was this:

I changed the fuel pump relay.
I found that the vacuum line to the waist gate was rigged and was leaking, so I fixed that.
The grounds are all good now.
The boost gauge vacuum line was cracked so i fixed that.

It started and ran fine, but after a while the light came back on, and I lost power again.
I shut it off for a while and then it restarted fine and ran fine again for a bit, and then pooped again.
Just a bit ago I ran up to Auto Zone (and got pulled for the tinted windows lol) and it was running rough on the way up, but after restarting at Auto Zone, it ran fine all the way home again, till just before my driveway and then back to poop.

I bet it runs fine in the morning again.

So if there are any ideas other that the LP just going bad.... (because I really hope its not) shoot them at me.

How about the little black rubber thing under the intake that is plugged into the top the the LP in the center of that short harness? It must be like a resistor or something. (I hope you know what I mean)

I did see that the wastegate vacuum thing is working (it moves when I unplug the vacuum and I can hear it dump when I let off)

Still Spit Choke and Puke when the light is on and I'm giving it more than half throttle.
But when that light is off..... WEEEEEeeeeeeee!! :tu:

what the code when light come back on

I just fix my buddy truck today that was doing thing we found it was bad OPS

Bad OPS will shut off the LP

Thinking the black rubber you are talking about is OS filter harness take it off plug wire back in see how it runs

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try this next time it running rough open the t-valve see if there good flow fuel and next thing you can try is put 12v to LP and see how it runs

The other day when I did the T valve test it was with it running rough and it pumped near a full gallon.

Ill try the other things in the morning.

And what is the "OPS"? and where is it?