injector pump adjustment, any thoughts? - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 05-27-2010, 11:37 PM
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injector pump adjustment, any thoughts?

i just got my 7.3 idi with a banks turbo, and a friend told me that you can increase the output on the injector pump with just the turn of a screw. i've been doing a little research on it but can't find anyone who's really done it.
has anyone done it and found that you get some good results?

also, is there any other mods for this engine? (injectors, intake, etc)
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Old 05-28-2010, 02:00 AM
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Ok

1. Yes there is a internal screw that you can turn up to increase fuel and in turn boost and power. Do you know whether or not your injector pump has already been turned up or not?

2. You NEED to have an Exhaust temp guage installed to monitor exhaust gas temps (EGT's) if you do this. Otherwise you are likely to burn up the engine due to high EGT's.

3. No there really arent too many things off the shelf things to mod this engine. Most of your options are finding a few IDI gurus and letting them guide you since most of the stuff is built not bought for these rigs.

If you are interested I will help you with this stuff but you have to remember that you need to monitor EGT's or you will be sorry....

Thad
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Old 05-28-2010, 07:59 AM
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oh okay, yea i do have a temp gauge so i'll try messing with that screw, no it hasn't been touched yet to my knowledge
is there any way to tell if it has been turned up?

anyways, yea i'll let you know if i decide to do anything else to the engine, thanks a lot for the help!
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Old 05-28-2010, 01:11 PM
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There is really no way of knowing whether the IP has been turned up.

I am patiently waiting to hear more!

Thad
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Old 05-28-2010, 07:58 PM
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i don't think it has, it never blows smoke and i can't imagine the previous owner doing it.

yea i'll let you know if i can get to it tomorrow, i get off work at 5 so i'll actually have some daylight to work on it!
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Old 05-28-2010, 11:26 PM
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Be REAL careful when turning up the screw. You will probably need a small mirrow to aid in the process.

Have you done this before? If not just ask so I can help you set it up....

The only time mine smoked was under real heavy load going uphill and then again up at 10,000 feet in Colorado.....the air was a little thin.

The best fuel to power ratio is going to be right before you start to see black smoke. Black smoke is wasted fuel!!!

Good Luck!

Thad
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Old 05-29-2010, 09:45 PM
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i haven't done it before but i'm working on it with my friend who is a mechanic and works on his powerstroke all the time.

yea, from what i've read it should only be done 1/4 turn at a time. but i'll definitely let you know if i need help getting to it because it is in a pretty rough spot (not to mention my banks intake gets in the way...)
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Old 05-30-2010, 03:17 AM
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Yeah, the Banks intake I had was miserable to get around. I just got used to removing it all the time.

I wouldn't even go a 1/4 turn. I stayed right around 1/6th or so for each adjustment. But you can adjust it to suit your needs however you decide.

Remember to put some rags or something to absorb/catch the fuel from the IP.

Thad
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Old 05-30-2010, 03:24 AM
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My son recently bought a '86 6.9 IDI (set up for veggie) and has gotten that thing running real nice. He has done a lot of research and purchased manuals. I personally don't know much about them but I bet he does! Not sure if he "enhanced" his or not. I'll ask him when he gets up for work. Maybe he can look at this thread tonight and comment.
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Old 05-30-2010, 03:29 AM
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Thad? Did you own one? Would you recommend owning one? I thot my next purchase might be an old 6.9 or 7.3. I like the idea of "reverse-technology". More dependable in my opinion.
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