The truck is a 94 Ford 9000. A reman Bosch P-7100 injector pump was installed on it. It is apparently turned all the way down. It will not smoke at all loaded or not and is even sluggish sitting still just matting the pedal. It will barely pull itself with a load on it. The pump looks similar to what is on a buddy of mine's 92 Dodge ctd. We turned up the Dodge, are the same techniques gonna work on this pump? TIA

 

If it's the same pump it should be the same to turn up. Just watch those EGT's exspecially if towing heavy.

 

It is similar but not the same. It is a 10-wheeler. Any big truck mechanics out there?

 

The pump you have should be so similar to the one used by Dodges from 94 through 98, that the same principles apply as for those. The 92 should have been a VE pump, and that is completely different.

You will want a slightly fatter low end than used by the Dodge, and the pump kits you need are sold by BD-Power and Piers as motorhome power enhancements for the 8.3 motorhome engine.

However, before I touched the pump I would take a look at the overflow valve. If it is the original style overflow valve with single wrench head it is shot, and that is where your power is going. The next thing to watch is your timing. The CPL on the engine should list the timing to use, and you should be safe going up to two degrees higher if the truck is an Allison automatic, stay with the CPL timing if it is a standard. But, whatever it should be, be sure to check it.

The fuel hoses, filters, and tank pick-up are also areas that should be checked for plugging. If you have a brass fuel fill with a small breather hole, clean that hole, most of them plug and the owners never even notice until they run out of power. Nearly all trucks use a full sized single or double fuel filter with about ten feet of flexible hose. The same issues are found with that hose as with the Dodges, so make sure it is new. Most of the real trucks do not have a fuel heater and that screened prefilter found on Dodges, but should you have one, replace the screen and use dielectric grease on the heater connector.

The other things to check are the turbo hoses and the intercooler for leaks, the top of the air plenum and air horn for being loose, and plugged air filters. Also check the AFC housing and the pressure lines from the engine to that and to the wastegate on the turbo. A leak in any of those pressure lines can make the AFC slow to release or keep it from fully releasing.

Lastly, check the fuel shutoff. Most trucks are electric solenoids, just like the Dodge. The adjustment on the arm between the solenoid and the pump is the same as for the Dodge. What happens is that the solenoid gets dirty and will not fully retract, or the arm gets bent and will not fully open the fuel stop.

 

RCW, THANKS for your advice. I am very new to the Bosch pumps. I have schooled myself on my PSD and Caterpillars B and C models. I am now trying to learn the Cummins and Bosch combos. I am not familiar with the problem areas such as the overflow valve and and flex hose. Where do I find the overflow valve and I am assuming the flex hose will either crimp or tatter on the inside like a rubber brake line?. I was about to start on some of your previous advice today when the civil defense sirens went off . After the squall line went through I had to check fences and shingles. I have also heard something about grinding the fuel plate(?). Does this pump use "buttons" for adding fuel? Thanks again, Rodney

 

the overflow valve is on the side of the pump, on the very top corner on the front end of the pump. (left side, if yuo look at it from the front! there is a returning fuel line leading away from the overflow valve.

 

Thanks, guys, I have checked the fuel supply and return lines and breather in the tank. All is well. I turned the star-wheel up several rounds and the truck came alive. I was shocked at the difference across the board. Now I want to get this "plate grinding" procedure underway. I understand how to get to it and so on thanks to TST but the grinding issue isnt covered there or I didnt see it. What are the references or templates for this mod? Thanks again. I have to spend all day in this truck and it is soooooo much better to be able to accelerate at a reasonalble pace than the sloth pace before.