Well it's been 11 years now since I have done this so I wanted to get a refresher. A buddy of mine bought a 89 ford tonner with a 7.3 in it. I remember from the days before my stroker how to juice the pump but for the life of me I can't remember which direction to turn.

Any help would be appreciated.

 

I know someone should be able to tell me which way to turn, clockwise-counter clockwise. I just can't remember!!

 

http://www.members.shaw.ca/k2pilot/I...%20article.htm

 

I'm jumping in he boys, a question i have is on my 1991 e350 7.3 is the ajustment on the back of the pump or is it the pump with the small door I have to remove I wont to try this but am worried about melting my pistons and witch way do you turn it for beter fuel cost ???

 

its the small pentagon looking side door on the passengers side. turn it clock wise (or to the front of the truck)

 

On the 91 the only adjustment is inside the IP.

The best adjustment for more fuel mileage is wear lighter shoes.
Taking off fast and high speed driving do suck down the fuel.
I wear size 13 shoes with metatarsal protection, a steel plate under my insole and steel toes , so you can guess where my fuel mileage is.
But I never have to worry about hurting my feet at work on the bright side.

If you adjust the IP for less pressure, you will not have the power when you need it.
Also you will have to work the engine harder in lower gears on any hills, so the fuel economy will not increase like you think it would.

I can vary my fuel mileage over 6 MPG just by changing my driving style.
80 MPH cruising speed, leaving the stop light like a dragster and keeping the power on right up till I have to stomp the brakes to stop for the next light I can get down to 8 or 9 MPG.

Take off like I am my age, drive 60 MPH and light foot the throttle leaving the stop lights and coasting up to the next light I can get over 15 MPG.

The only difference is the style I drive with.

I like the price I pay at the pump when I drive like my age, but acting like I am still a young driver sure is fun.
The old man in the old truck can still roll the black smoke with the best of them.

 

black smoke whats that, I only get white smoke! Ha HA I use to get black but no more!
Does any one know what the little screw on the backof the pump is with the set nut on it is for?

 

I think you are looking at an alignment pin.

The 1992.5 -1994 NA IP had an external fuel screw on the back of the pump.
DB2-5028 for the auto tranny
DB2-5013 for the manual tranny

93 and 94 7.3 turbo had the same screw,
DB2-5069 for the auto tranny
DB2 5070 for the manual tranny

 

mine is a 1991 7.3

 

EXTERNAL fuel scew????

Are you reffereing to the same type of adjustment that requires emptying the IP and rotating the engine to change the fuel setting?

Is it possible to replace the older ones (with internal adjustment) with the newer type?

 

The external screw does not adjust the max fuel pressure like the internal one does.
The external one has more to do with how much fuel the IP puts out at lower RPM.

Several people call it a torque screw.
The screw is located on the rear drivers side, just behind the FSS cover.
It is at a 45 degree angle in relation to the injection line cone.

I think I have a picture somewhere, if I can find it I will add it in a bit.

You should be able to run a DB2 5069 and G injectors with good results.

 

OK, now I get it. That scew I HAVE heard of, thanks for clearing that up.

What sort of differences are there for the different injector codes over the years? Newer ones simply dump more fuel in?