Engine Specific Info and Questions > Non VW Group Diesel

6.9l idi ford DB2 IP issue

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wdkingery:
My brother has a 1986 Ford f250 with a 6.9l idi IH motor in it. the previous owner installed a banks turbo, some gauges and a shift kit in the auto trans.

my brother dislikes driving and owning it, but I won't let him get rid of it, so it just sits.

well i have been out of the country as of late, and now that i'm back, i decided to fire it up and take it for a spin. boy i loved how it cranked right up after 6+ months of sitting!

well, drove it for about 20 minutes, was idling past the front door of a walmart and it just shut off. i mean plain conked out. this truck has never done this before! no, i don't abuse this one with motor oils, etc.

well, the only way it would fire up is if i gave it some skinny pedal. so i got it running, and now it idles on it's own, starts fine, etc. but something is wrong. it's like the gas pedal wont' push far enough; i cannot get boost to build very well, it won't stretch it's shifts on out like it should when floored.. but i checked the accelerator cable it's fine.

wonder what happened to that pump?? i suspected water in the fuel.. i've since checked the fuel i found in the filter, didn't find water.. added some iso-heet to the tanks.

anyone got an idea about why it just won't go? you almost have to floor it to accelerate normally, and this truck, with it's aftermarket turbo and IP turned all the way up used to zip right along 20 seconds before the walmart fall out.

i don't know enough about the 2 vacuum lines and the electrical bits on the IP. 

vanbcguy:
A clogged fuel filter would definitely do that. I'd start with a fresh filter and go from there.

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jboogie13:
Diesel purge the pump just for good measure, friend of mine has a 7.3 IDI, those trucks are awesome.

mzak88:
The factory water separator has to go, if it hasn't already. They always leak air into fuel system, being on the vacuum side. Stanadyne FM 100 is awesome. Consider an electric lift pump at the tank(s).

wdkingery:
I am afraid that removing the water separator is what got me in this situation.. Cause I never replaced it with anything! The owner was supposed to get a screw one type with a separator as part of it.

I think something inside the pump has snapped. It runs just great. Idles fine. Just has no power. Basically have to floor it, isn't making any egt, won't really produce any boost. I mean it will make a pound or 2 when you really wring it out but.. It's like I'm not pushing the pedal hard enough. I just don't know what's inside the pump to know

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