Truck died when switching gears, can’t figure out why!

[KansasIDI]

Yea that makes sense, I think tomorrow I’m going to drop the rear tank and run a new line, I also am looking at picking up a new IP and want to check options before I lose hope on mine.

Anyone have any good feedback on where to purchase a new IP, pricing is kind of all over the place & with this 6.9 it does have a turbo, idk if that changes anything when buying a new one.

Oct 23 I got a Moose pump, I had it on my 86 and had no problems with it

June 24 I ordered a Moose pump for my 91, planning on installing it this weekend, along with an intercooler.

 

[Kingralph88]

Very nice, good to hear thank you.

I may not need a new pump after all..

Update: Left Diesel Klean in a new fuel filter soaking the IP (60% Additive 40% fuel) all afternoon yesterday until 10am today, also gave a nice oil change. Went to turn the key and she turned over so nicely, 0 struggle the engine sounded new. Popped the hood and everything was running perfectly. Took her out for a spin to really push some fuel through and loses things up, no stalling, no diving of rpm’s or power. Seems like it’s running great! I’m happy about it & I know 128k miles is maybe right at new injectors for pretty normal wear and tear (especially being 39 years old). I pulled the rear fuel tank and thinking of getting a 39 gal.

I never did check my lift pump pressure either..

 

[Nero]

Hey if its running good now, dont bother. I'm betting some junk came loose and thats all it was. Glad its running better!

 

[IDIBRONCO]

It still may be a good idea to add some Diesel Kleen to the fuel for a couple of tanks. Just in case. Unless it acts up again, I don't see a need to fill your fuel filter with it.

 

[Kingralph88]

Yea I ran her about 100 miles today and also dropped the rear tank earlier.

She’s running actually really nicely, I’m certain something got gummed up and finally broke loose. I do think it’s a good idea to keep some diesel Klean in the fuel for a while, maybe next 5-6 fill ups.

I didn’t know anything about this truck until i joined here and started asking and reading, super helpful Nero much appreciated! I’m going to keep you guys updated on how she’s running going forward!

 

[IDIBRONCO]

These are old, usually not well maintained trucks, but once you get all of those little problems sorted out, they are pretty reliable trucks.

 

[Kingralph88]

Does anyone know how far the slave is supposed to push the clutch fork? The total distance from when the clutch pedal is up (slave not engaged) to clutch pushed fully down (slave engaging clutch fork 100%)?

I think I may have to cut, bend and re-weld the clutch fork or the slave is not engaging 100% distance to push the clutch out.. not sure yet but want to measure before I start cutting up my clutch fork.

 

[IDIBRONCO]

Do you still have the plastic cover on the end of the slave push rod? That can make a difference. How's the linkages under the dash? All good? Bad bushings? Worn arm on the end of the pivot arm that runs from one side to the other? Missing bushing on the end of that arm where the master push rod attaches? These are all thing to look at too.

 

[Kingralph88]

Do you still have the plastic cover on the end of the slave push rod? That can make a difference. How's the linkages under the dash? All good? Bad bushings? Worn arm on the end of the pivot arm that runs from one side to the other? Missing bushing on the end of that arm where the master push rod attaches? These are all thing to look at too.

I do still have the plastic end on the slave, I just replaced the slave and master.

I disconnected the pushrod on the master Cylinder to check the pedal assembly and see how the bushings act by themselves, I believe everything is fine there. When it’s disconnected the pedal falls the the ground nicely and has to be pulled back up but there’s no resistance or friction.

I’ll take a video of the pedal assembly and post back that way if I’m missing something maybe someone can point it out!

 

[nelstomlinson]

I put a pint of the Power Service white bottle additive in each tank at each fill up, along with a pint of Walmart 2 cycle oil for extra lubricity.

 

[RSchanz]

Very nice, good to hear thank you.

I may not need a new pump after all..

Update: Left Diesel Klean in a new fuel filter soaking the IP (60% Additive 40% fuel) all afternoon yesterday until 10am today, also gave a nice oil change. Went to turn the key and she turned over so nicely, 0 struggle the engine sounded new. Popped the hood and everything was running perfectly. Took her out for a spin to really push some fuel through and loses things up, no stalling, no diving of rpm’s or power. Seems like it’s running great! I’m happy about it & I know 128k miles is maybe right at new injectors for pretty normal wear and tear (especially being 39 years old). I pulled the rear fuel tank and thinking of getting a 39 gal.

I never did check my lift pump pressure either..

Reviving this semi-old thread.

On page one you said you left ATF in it over night but this didn't end up fixing the problem. Sounds like you did a very similar thing here but instead of ATF used Diesel Klean and replaced the filter and then this seemed to fix it. Right?