Adjusting New Injector Pump
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New User
Joined: Apr 2006
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Adjusting New Injector Pump
After much testing, whining & denial I finaly gave up and installed a new (and very expencive) injector pump on my 85 F250 (6.9 no turbo). It's now up and running but smokes like a house on fire. I think I need to turn down the fuel flow but I can't seem to find the posting for the exact procedure. If some can walk me through the steps or rederect me to the thread where it's allready posted I would be very greatfull. Thanks.
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Spooky, When I went back to the forum after posting, some had just posted a simular question,, To clarify mine, my engine starts hard but runs fine. It just smokes alot warm , cold, idle or full throtle. I even have drips of unburned fuel coming out the exhaust. so I'm running VERY rich.
Tuned
Joined: Oct 2004
Posts: 250
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From: new york
As long as you did not remove the housing assembly and just unbolted the ip and slid it out. Your timing should not be affected and I think you have allignment marks on both the pump and housing. I'm don't think adjusting the maxium fuel setting will help. It sounds like it mite be timing or possibly a defective pump. Heres why, on a diesel there is no intake air control,(like the butterfly inside a carb on a gas engine) so if the diesel is getting extra fuel it will just keep gaining rpm untill it burns all the fuel. If your geting smoke and raw fuel out the exhaust it could be an intake air restriction of a timing problem, fuel arriveing in the cylinder at the wrong time to be properly burnt.
The maxium fuel setting will not have any effect on idleing and if the new pump was the correct one for your application it will have been calibrated and shouldn't need any tinkering with.
Is this a similar problem you had before you changed the pump?
Keep us posted.
The maxium fuel setting will not have any effect on idleing and if the new pump was the correct one for your application it will have been calibrated and shouldn't need any tinkering with.
Is this a similar problem you had before you changed the pump?
Keep us posted.
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No, the problem was it just died. it was running strong and smoke free. it hessitated a few times after a long drive then died in the middle of the street. I did every test that I could to verify it was an injector pump problem. (and all that were suggjested, see my last string) I got the pump from Ford so hopfully it's right. The old pump had no number plate on it but the new one looks identitcal and bolted right up. We thought maybe it was just left over fuel in the exhaust system but after an hour the smoke did not subside. Other than the smoke and being hard to start it seems to run fine. I haven't taken it on the Hwy yet for fear of blacking out Dallas.
Tuned
Joined: Oct 2004
Posts: 250
Likes: 6
From: new york
Yea all of the 6.9 pumps had a drive flex ring that would come apart and plug the check valve(you drive awhile and it runs out of power and quits wait five minutes and it starts and does the same thing) I would suggest advancing pump timing. Loosen the three hold down nuts and rotate the pump (move the top of the pump toward the passenger side) Only move it a little about the thickness of a business card, it will be hard to twist with the lines on and tight but it can be done. If you pry against the pump be careful its best to have a second pair of hands, one to twist the pump one to tighten the nut.
If it seems better I would certainly drive the truck to get plenty of fuel through the pump, If the pump has been sitting on a shelf and is a little gummed up, fresh diesel is like a solvant and will clean up the pump. good luck
If it seems better I would certainly drive the truck to get plenty of fuel through the pump, If the pump has been sitting on a shelf and is a little gummed up, fresh diesel is like a solvant and will clean up the pump. good luck
