Injection pump mystery
Thread Starter
|
New User
Joined: May 2008
Posts: 10
Likes: 0
Injection pump mystery
I recently bought an 86' F-350 with the good ol' 6.9 diesel in it. It wasn't running up to par so I replaced the injection pump and injectors. Since then I can't get it to run right, it starts hard, smokes like mad, and rattles. Sounds like its advanced too far, however, when I retard the timing I can't get the truck to run at all. Has anyone ever encountered this problem? If so, how was it corrected?
Thread Starter
|
New User
Joined: May 2008
Posts: 10
Likes: 0
The pump was just unbolted and removed. My manuel didn't list any timing settings that had to be made before removing it. The drive gear was not removed but the housing was lifted off in order to reseal it, I took special care not to let the gear jump time when I did it. I was going to make sure the gear was in time but the timing marks on the cam gear are not visible with the front cover in place. I didn't know if there was something I did or didn't do when the pump was replaced. Wanted an experianced opinion on the matter.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
There is a scribe line on both the IP neck and the back of the IP drive gear cover.
Those marks in a line is the static timing setting.
As long as the teeth did not unmesh, the engine should run there.
Those marks in a line is the static timing setting.
As long as the teeth did not unmesh, the engine should run there.
Elder User
Joined: Aug 2007
Posts: 728
Likes: 0
i would remove the cover and verify the timing marks
it ran bad before and the cover was leaking the previous owner could have the gears out of time
you can see the marks using a very reflective table knife
it is the only thing thin enough to insert in the gap and be able to see the mark
it ran bad before and the cover was leaking the previous owner could have the gears out of time
you can see the marks using a very reflective table knife
it is the only thing thin enough to insert in the gap and be able to see the mark
Thread Starter
|
New User
Joined: May 2008
Posts: 10
Likes: 0
There are no scribe marks on the injection pump because it is a remanufactured unit. I will pull the gear housing, check the timing marks and report back. Thanks a million for the help, its nice the have some experianced opinions on the matter.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
You have to pull more than the IP drive gear cover.
You may be able to feel the mark with a pick.
But to see it, fan, alternator, AC compressor, power steering pump, vacuum pump, water pump, harmonic balancer, timing gear cover all have to come off.
There should be a line, top center of both the IP neck and the IP drive gear cover where it meets the IP neck.
May have to do a little cleaning, but they are there on all of them.
You may be able to feel the mark with a pick.
But to see it, fan, alternator, AC compressor, power steering pump, vacuum pump, water pump, harmonic balancer, timing gear cover all have to come off.
There should be a line, top center of both the IP neck and the IP drive gear cover where it meets the IP neck.
May have to do a little cleaning, but they are there on all of them.
Trending Topics
Post Fiend
Joined: Oct 2007
Posts: 10,501
Likes: 5
From: Faibanks Ak.
There is a factory scribe mark on the IP even on a rebuilt unit it will be there right on top where it bolts to the gear cover.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread Starter
|
New User
Joined: May 2008
Posts: 10
Likes: 0
I rechecked the pump, there is a flat spot on the neck where it looks like the original scribe mark has been ground off. I haven't had a chance to pull the cover and check the timing marks yet. This is my sevice truck and it has been sitting at the jobsite since I changed the pump. I am behind on this job at the moment so it might be a few days before I can get back to it. I'll report back when I can, thanks guys.