Ok, so I'm almost done rebuilding my injector pump and I have a question about my fuel screw . Prior to removing it I measured it using vernier calipers. Verified the measurement three times. When reinstalling it it feels like it's almost bottomed out to get the same measurement as o got before removal. could something be out of whack in the pump? I know my measurement is accurate and by far better than just marking the screw. Any idea? Thinking about backing it out a ways and then readjusting after I get it cranked. Wanted to keep my previous settings as I am fixing to make some other upgrades and dyno again to see my gains.

 

I vote for this.

 

You may have inadvertently already been about bottomed out. I had to add about 1/4" to the end of my fuel screw before it would hang up in my 93.

I would do as David already agreed with, and go from there.

 

Well I had to remove the cover again anyway so I ran the screw back in. Still gets tight at the same point but I went ahead and left it 2 turns out. Will fine tune it on the truck.

 

Make sure you have a block of wood or aluminun to block off the air supply in the event of a runaway.

It is kind of scary when you are leaning in the engine when it happens.

 

Been there done that