91 350 4x4. I've got a veritable torrent of fuel running from my inj pump when the truck is running. It appears to be coming from the shaft that rotates when the throttle moves. I think I read about a bushing that needs to be replaced when this happens, but I can't find the original post. A couple of questions:

1. Can this be done with the pump still on the engine? Or do I need to pull it?

2. What is the part number or a description of the bushing?

Anything else I should be looking at?


thanks

stu...

 

If you have a pump shop that is willing to work on the pump cover if you bring it to them, then you don't have to pull the pump. Just follow the directions in the "tech facts" section on installing a 3200 RPM governor spring, that will tell you how to remove the pump cover. AFAIK, the bushing is something the pump shop needs to do since it has to be honed precisely to fit the throttle shaft - or it leaks. The whole inside of our pumps is pressurized when the engine is running. You might want to do the 3200 RPM spring while you're in there to get a little more speed out of the old girl.

 

Bosch shop about 6 months ago replaced the bushing as well as the leaking fuel pin seal. Took about 2 hours in all to do the job with the pump on the truck.

 

As Monty said, find a Bosch dealer and take the numbers off your injection pump and tell them you need a new bushing, shaft and o-ring. If you are very patient you can do the job yourself. I have had to do them while still on the engine that is installed in heavy equipment. Being a contortionist is getting out of my league now a days but still manage to do a few.
If interested i can give you more info. Most Bosch shops here in the NW are pretty good to work with as long as you're not jumping on your tip-toes to get it done. )

 

Yup, piece of cake for the shop to do and it's an upgraded mild steel bushing instead of the old brass style.
It'll last alot longer. While they're in there have them replace the little o-ring that seals off the pumps "guide pin". This will save you some headache and pulling the pump top off in the future for an o-ring that is so darn small you nearly need an electron microscope to see it....ok I need it since my eye's is gitten old but it IS tiny....

bob....