I installed my old 50hp injectors that came out of my old motor, they only had about 10k on them. Anyway something was not right, you could thighten them a little and it would change the way the motor ran, loosen them and it would go back. So I decided to clean up my old original (200k) injectors, that was a hilarious event, first I lost a shim, looked for about a hour and nothing, gave up and decided to swep up the floor and bingo found it. So I get back to the job at hand and now I forgot which one it went in so I just guessed. Decided I better go have them tested, and wow I got it right But they came back and said they are all weak. I am pissed now, I aint paying there price of 96.00 each. So I put them back in anyway, and truck runs better than it has in a long time. I was talking to the owner of the place and after I said I would just put them back in anyway. He says they should be fine if they where running good before just dont let it idle for long periods of time.Like I said it runs good, no smoke of anykind. A little puff when it first starts and the rest is clean. Sure I dont have the hp I had but I was getting 16 mpg in a 11k welding tk before I decided to put the 50's in and mpg fell 1 mile per gal. So after the clean up I am interested to see what mpg's it get's now.

I don't think the shims matter that much. They are all the same size from the factory as far as I can tell. One interesting thing is when I took johnfaks apart, some had 2 shims and some had 1, but if you measured the thickness with calipers, the 2 shims were the same thickness as the one shim. I don't know what the deal was there.

Yea, I think my 50hp injectors have something going on that's not right because I was getting 16 with them in the old motor. I am going to check everything with calipers and see if I can find anything. They may just need cleaning because the old motor had weird carbon build up.