85 F250 6.9 NA Issues

[Black dawg]

Any ideas on how that screw should be adjusted? I dont have any gauges to check pressure.

I dont know how to adjust it. On some pumps it preloads a small spring that affects the low speed gov, some pumps dont have that spring.

I would just get it close to where it was.

It sounds to me like the injection pump is having an advance piston problem.
with the engine idling, push the plunger in, the change should be pretty drastic.

 

[69IDI]

If it means anything, when its running and the shrader valve is pushed in, it sprays a good amount of fuel.

When the plunger is pushed in it makes a large difference, runs rough, blows a lot of white/blue smoke.

 

[69IDI]

This is the screw you are talking about correct?

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[Black dawg]

This is the screw you are talking about correct?

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yes.

 

[69IDI]

So is that pump off a 6.9 or a 7.3?

 

[Black dawg]

6.9 or 7.3 up to early 92.

 

[69IDI]

Anyone know how that bolt should be adjusted?

 

[Black dawg]

I would try backing it out and see if the idle gets unstable.

 

[blown84]

Don't mean to hijack, but since its on subject, what if any modifications would I need to make for a 94 IP? I know it will bolt on, but what bout wiring? I haven't really looked at it much.

 

[69IDI]

So what pump do i need for this old girl?

 

[69IDI]

Will this pump work for my 6.9?

http://www.ebay.com/itm/FUEL-INJECT...Truck_Parts_Accessories&vxp=mtr#ht_500wt_1054

 

[94IDIT]

Will this pump work for my 6.9?

http://www.ebay.com/itm/FUEL-INJECT...Truck_Parts_Accessories&vxp=mtr#ht_500wt_1054

Yes it will. 6.9 and 7.3 pumps are interchangeable. Pretty much the same thing.

 

[69IDI]

Is that pump a good choice? Will tuning be needed? thanks

 

[94IDIT]

Well I've never owned a U-haul pump, but others on here have, and are satisfied with them. Pehaps someone who has one can chime in. And yes, it will need to be timed once you get it installed. There should be an article in the idi tech articles section of this site, that should explain the installation procedures and such. I'll see if I can find a link.

 

[94IDIT]

Here ya go: http://oilburners.net/brian/idi/FuelInjectionServicing.htm