6.9 Ford/IH

Anybody knowledgeable on these? I've got one in a 86 F250. As long as the cold idle solenoid is on it runs great. Soon as the cold idle goes off it runs rough and smokes a little grey/blue smoke and the fumes are pretty bad. I asked this on a Ford forum but some of the folks over there can be a$$holes and I just don't want to go back. One suggested its a bad injector. I've also been told air in the system but I figure if it's air it wouldn't run good on cold idle then bad on normal. Any thoughts (other than tannerite)? I'm not sure exactly how many miles are on it because it has a 5 digit odometer. Every 100K it reads 0 and I sure don't know how long it's been since it had injectors. I did put return lines and caps on last summer

Edited by thendrix - 30 Apr 2018 at 4:14pm

our family stables had one of them, kept losing injectors and glow plugs. glow plugs was almost a monthly replace, even in summer

Try getting a sample of fuel out of the schrader valve while its running. If it's foamy, you got air. You can possibly narrow it down by switching tanks, see if it's any different. Pull the injectors yourself and have them tested. There ain't much to these motors. Bet its one or the other. Mine ran kinda the same way and I had a hole rubbed through on the fuel line between the selector valve and fuel pump.

The lines going to the rear tank were so rusted and riddled with holes it wouldn't suck fuel from the rear tank at all.


Edited by Les Royer - 01 May 2018 at 3:43am

thendrix wrote: Anybody knowledgeable on these? I've got one in a 86 F250. As long as the cold idle solenoid is on it runs great. Soon as the cold idle goes off it runs rough and smokes a little grey/blue smoke and the fumes are pretty bad. I asked this on a Ford forum but some of the folks over there can be a$$holes and I just don't want to go back. One suggested its a bad injector. I've also been told air in the system but I figure if it's air it wouldn't run good on cold idle then bad on normal. Any thoughts (other than tannerite)? I'm not sure exactly how many miles are on it because it has a 5 digit odometer. Every 100K it reads 0 and I sure don't know how long it's been since it had injectors. I did put return lines and caps on last summer

I dont know the answers but iv had the same problem on the ford fourm. Iv got a 67 f350 that im trying to find out what kind of one peace wheels i can use one it and they have been no help.

Yes there 2 peace wheels. And have those funk ever other raised spot for the lug nut

I had an 87 model and the water separator gave me problems!

I have an 83 F-250 that I bought new with 6.9. Now working on 350,000 miles working on engine #3 and cab#2. I have replaced pumps, injectors, return lines, injector caps. There is a place in Topeka, KS that I call with issues I cannot figure out. Do you see any fuel spots after it setting? Sounds to me like you are getting air in the fuel system somewhere.

around here no one will fix or work with split rims. Dodge 8 bolt rims will fit on the ferd.