Adjusting the Fuel Injection Pump on a 6.9L & 7.3L Ford Diesel IDI
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Diesel Enthusiast
Joined: Dec 2009
Posts: 299
Likes: 5
From: Wichita, Ks.
Is this a trick question?
Are you just ******* with us? 
Newbie
Joined: Mar 2013
Posts: 3
Likes: 0
Hello agian.
My problem with this 7.3 idi (it has 103,000 miles) is that when I try to maintain a highway speed (50-60 mhp)going up a steep hill the engine loses power, starts to miss and make that pinpng sound.
Then it down shifts (automatic trans). The engine strains very hard to climb the grade, I'm down to 35-40 mph now w/cars trying to pass, Very annouying and almost dangerous.
Then engine does'nt smoke when this happens. It seems engine is starving of fuel. It has new fuel filter.
Is it bad fuel (low cetene)?
Fuel pump timing?
Bad fuel injectors? (not sure how old they are)
ALL THE ABOVE?..
In town driving it runs like a champ except when I excellorate a little harder than normal
then it pings/misses a little.
Another question:
How in the world dose this 7.3L exhale through a single 2-1/4" exhaust pipe?
Could this be part of the prolem?
would very much appreciate any help.
SB
---AutoMerged DoublePost---
OOPS! sorry, new here hope I did'nt interrupt a thread
My problem with this 7.3 idi (it has 103,000 miles) is that when I try to maintain a highway speed (50-60 mhp)going up a steep hill the engine loses power, starts to miss and make that pinpng sound.
Then it down shifts (automatic trans). The engine strains very hard to climb the grade, I'm down to 35-40 mph now w/cars trying to pass, Very annouying and almost dangerous.
Then engine does'nt smoke when this happens. It seems engine is starving of fuel. It has new fuel filter.
Is it bad fuel (low cetene)?
Fuel pump timing?
Bad fuel injectors? (not sure how old they are)
ALL THE ABOVE?..
In town driving it runs like a champ except when I excellorate a little harder than normal
then it pings/misses a little.
Another question:
How in the world dose this 7.3L exhale through a single 2-1/4" exhaust pipe?
Could this be part of the prolem?
would very much appreciate any help.
SB
---AutoMerged DoublePost---
OOPS! sorry, new here hope I did'nt interrupt a thread
Newbie
Joined: May 2013
Posts: 1
Likes: 0
1988 f350 7.3idi
just joined site and just bought ford with 7.3idi is in exclent shape want to do exaust and turn up fule is there any one that sells an exaust kit or do i need to build from scratch im pulling a 30ft four seasons travel trailer want all the power i can get
Diesel Bomber
Joined: Jun 2010
Posts: 3,202
Likes: 143
From: Tacoma
94 .... u want to need a new set of pistons ? ... black smoke is unburt fuel = more cylinder heat and can damage the internals of the cylinder ... like scoring up the cylinders and melting the insert in the head .. read then go and do it .. also might wanna get a Pyrometer before you play too much .. or you will be sorry ..
Diesel Fan
Joined: Dec 2013
Posts: 10
Likes: 0
I do have a piro a boost and a trans temp not that the last really matters in this case. Also my brother is a nashville auto diesel college graduate and he and I were both raised in a mechanic atmosphere so I know I little about the heat. No disrespect intended. Now I know what unburnt fuel is and how to a certain point it makes the engine create more heat buutttttt. At a certain point the more you turn up the fuel the more it acually cools the cylinders and engine down. My brother and I found this out on his 91 7.3 idi n/a I want to get mine past that point so it will roll coal and still stay cool. Any ideas why the fuel screw wont turn anymore than one half of a flat?
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Also just wondering I have come to find out that the injectors in the factory turbo trucks were code gg injectors are what does this mean is it more or less flow than say the bb injectors?
---AutoMerged DoublePost---
Also just wondering I have come to find out that the injectors in the factory turbo trucks were code gg injectors are what does this mean is it more or less flow than say the bb injectors?
Last edited by 94 7.3 idi turbo; Dec 11, 2013 at 09:25 PM. Reason: Automerged Doublepost
Diesel Bomber
Joined: Jun 2010
Posts: 3,202
Likes: 143
From: Tacoma
yes BB codes have a bit bigger orfices and more flow .... and about 1 1/2 turns seemed to wake my N/A up quite a bit ...
wasnt sure what you knew about the whole heat/fuel issue .. i always assume its a kid who just got his first truck .. ya know...
wasnt sure what you knew about the whole heat/fuel issue .. i always assume its a kid who just got his first truck .. ya know...
