I went into the dvt and said go. then nothing then I started putting check marks in boxes and it died on the relay one. I stopped after that when i realized i really didnt know what I was doing. I am going to hold off until I do more research about how to do one and what I am actually looking for.

I dont know that it makes any differance but its a LLY.

I have not returned it to the stock tune yet. I am defianlty feeling like this :argh: though.

try this out. see attachment

thats great, LLYs are easier to figure out what injector has a problem and to change them is 10x faster. LLYs dont have as many injector problems as the LB7 but it still happens. the best injectors are in the latest trucks. if i could only fit a set of those piezo injectors in mine

before you get too far into "fixing" anything do the ice pick trick on the injector harness. this is a problem the LLYs have.

We did the bottle test, it passed. We unpluged fpr and only got 17500. I think a fpr is in my future.

may just be stuck. do a google search for the regulator mod. it will show how to open the regulator. you could also try pushing on the plunger with a thin rod,needle it see it it is before taking it apart.

if the regulator is burned out then the PSI should go to max. right now it is somewhere in between max and min.

the plunger is pulled by a solenoid and pushed by a spring. if the solenoid stops working then the spring pushes it all of the way open

Wow I read your post last night late and tore into it first thing this morning, and got evertying out of the way and then the reality of the 3 torx bit set in I think I managed to get on one of them then I decided that the cluster f that was about to happen trying to get them out let alone in is going to happen only once with a known good one going back in. They obvously thought that part would never go bad.

those 3 torx screws are a pain. took me like 2 1/2 hours just to get out those three screws. later i ended up taking out the CP3 and it was not much more work. sure made putting the regulator back on much easier.

i have heard of people cutting down torx screwdrivers with the hex shank just to get them out.

I like the idea of just pulling the cp3, I think I will just do that next time and just not fight it.

so did you find out if anything is wrong with it?

LOL No, I got to the point of modifying tools to get to the bolts and decided that was it until i had a gaurenteed working replacment, but found out the pipe that was in the way the one that goes in to the block that sends pressurized air to both sides of the block comes out by giggling for lack of a better term.