Some 6.9L questions...

[dylan8427]

I just bought a 1986 F-250 with the 6.9L IDI and I love it! Way on the slow side but thats ok. Unfortunately it looks like I'm going to have A LOT of trouble registering it because of title issues...

Anyway, she seems really tired, the idle screw is turned up so high that the high idle solenoid does not even touch the throttle when activated, yet the idle speed is about 750rpms... If I back the screw out til' it won't go any further, she stumbles and misses real bad, and then countinues for a while like that when turned back up. Does this mean my pump is waaayyy worn out? Starts fine.... warm. lol I have absolutley no working glow plugs so she is a pain to start cold, but if its at least 65F out, its not too bad. NO SMOKE when it runs bad, BLACK with my foot ALL (let up 1mm and it stops completely) the way down, and white when it doesn't quite want to start cold - good right (remember no glow plugs)?

Also, IIRC, the 7.3L IDI should have 6V to the glow plugs, but I get 12V on my 6.9L, were they different?

Oh, the motor has a "Banks Power Pack" on it, how much does this help, if any?

I do have an injection pump off of a 7.3L IDI, needs a fuel cutoff solenoid. Will the one in my IP work, and will this pump bolt on and work?

 

[ameristar1]

Welcome aboard, first off. The typical routine with a used IDI is to get the pump, injectors, lift pump and glowplugs freshened up, and then get the thing timed properly. Unless you have proof it was done within the last 100k miles, she's due. That will clear up the smoke and driveability issue for another 100k-150k miles depending on where you sourced the parts, and I would recommend using the people who participate here like Agnem and typ4 (Russ) to get you what you need. They won't screw you over.

If the Banks isn't a turbo, the parts help some, but not a lot. Naturally aspirated, these engines leave something to be desired, and when they are out of tune because of the injection system, make you want to do an engine swap. Once you get them right, they will make you smile.

 

[GenLightening]

Welcome! Another No. Nevadan. The 7.3 pump will work fine, just don't pull the housing with the pump! rad up on how to change it in the tech folder. I think the Power Pack is just a different intake filter. You may want to check out some of the wreckers and look for a GP controller from an '88 and up (oh, they both run 12v). What color are the injectors? if gray then they are original and may be worn out, I'd start with those and then do the IP if needed.

 

[dylan8427]

Welcome! Another No. Nevadan. The 7.3 pump will work fine, just don't pull the housing with the pump! rad up on how to change it in the tech folder. I think the Power Pack is just a different intake filter. You may want to check out some of the wreckers and look for a GP controller from an '88 and up (oh, they both run 12v). What color are the injectors? if gray then they are original and may be worn out, I'd start with those and then do the IP if needed.

Why not pull the housing with the pump? I pulled the 7.3 pump with its housing and gear.

I will look what color the injectors are tomorrow. I also have a complete set of 7.3L injectors... would those be better? Both pump and injectors are used with unknown miles though. No money for new stuff

 

[Knuckledragger]

If you pull the housing and pump together (the really easy way), you have a tough time matching the timing marks on the drive gear later when you are trying to do the reinstall. It is a small hassle to take the pump off of the housing, but worth the extra 15 minutes not having to fiddle with the gear later.

 

[dylan8427]

If you pull the housing and pump together (the really easy way), you have a tough time matching the timing marks on the drive gear later when you are trying to do the reinstall. It is a small hassle to take the pump off of the housing, but worth the extra 15 minutes not having to fiddle with the gear later.

Thats why I did it lol (easy) And it was never getting a new pump.. (parts truck) I will take the time to do it "right" then when and if I change the pump.

 

[GenLightening]

Yeah, what he said! Pulling it off a parts truck, I do it the easy way too. But do take the time to install it the right way, otherwise you'll spend lots of time getting it close, but maybe not right. When you pull the injectors, look to see if any are wet at the tips. Those would be leakers. The 7.3s may be better, no real way of telling other than if they aren't wet looking too. I pulled a set with rebuild tags on them, so I knew they had a good chance of being better than my gray ones....

 

[RLDSL]

If you pull the housing , you will most likely get the gear off a few teeth and your pump timing will be ***** , then you will need Ziggster's article to get out of the mess

 

[dylan8427]

If you pull the housing , you will most likely get the gear off a few teeth and your pump timing will be ***** , then you will need Ziggster's article to get out of the mess

Ok yea thanks.. I won't do that then

Have you been watching powerstroke help videos? "*****" lol

 

[Agnem]

The fuel system servicing article in our tech section should be of great help to you. As a new owner, your want to read both FAQ's and as many articles as you can digest.