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Eratic behavior from an 85' 6.2 (more below) requesting help please (Two vids in one)

Ok- PAY ATTENTION!!!

Aeration is the second most destructive way to destroy a high pressure pump.
That quarter second blast of bubbles you see go through- just count them as 3,000 miles less lifetime on the injection pump.
So stop playing around with the damn thing and replace all the lines.
Then fire it back up and get it running again. Then feel free to fiddle around with stuff. Because right now you are getting closer and closer to the death knell of the pump.

The faster way to kill the pump is just pour in some dirt filled water bypassing the filter-jic you’re wondering.
 
While the new fuel may be harder on the pump then the old fuel there wouldn't be very many db2s left on the road if it was drastic as that. Having said that IF you use the clear line there's no reason to take it for a test drive, just look at the hose while idling.
 
Another reason to use the clear line is that now you're getting ready to drop the tank. If you used the clear line you'd know if that is a wise time investment. If there are no bubbles going into the LP then there's no need to check further back. It's the ultimate diagnostic tool.
 
nycxjeremyy said:
My friend the ex Army MX (mechanic) guy literally stopped to go in reverse, and as soon as he stopped it reved to max RPMs before dropping and repeating the processes, we barely pulled in before parking and shutting it off in a hurry
Click to expand...

Are you saying here that is went WOT on it's own approaching 4000 + rpms? with out you or anyone pressing the throttle pedal?
 
from what I can tell here you have two compounding issues. 1. air intrusion from somewhere in the fuel system. 2. Possible IP going south.

I will wait for the guys to chime in on problem #2 That can wreck you whole day and then some if correct.
 
If you didn’t have massive air intrusion it would have blown up already.

I don’t have time currently to find a YouTube video showing how to assemble the governor correctly. This is what must be done. And get the top of the intake bare. A piece of plywood or steel to cover it completely. You need a perfect seal as best as possible.

Find or make something. Then show it here.

Then we go from there.

Until you can show what you have will do it adequately- doing anything else can destroy the engine and kill whoever is near it.
 
Will L. said:
If you didn’t have massive air intrusion it would have blown up already.

I don’t have time currently to find a YouTube video showing how to assemble the governor correctly. This is what must be done. And get the top of the intake bare. A piece of plywood or steel to cover it completely. You need a perfect seal as best as possible.

Find or make something. Then show it here.

Then we go from there.

Until you can show what you have will do it adequately- doing anything else can destroy the engine and kill whoever is near it.
Click to expand...
Copy sir, we'll leave it alone
 
Will L. said:
If you didn’t have massive air intrusion it would have blown up already.

I don’t have time currently to find a YouTube video showing how to assemble the governor correctly. This is what must be done. And get the top of the intake bare. A piece of plywood or steel to cover it completely. You need a perfect seal as best as possible.

Find or make something. Then show it here.

Then we go from there.

Until you can show what you have will do it adequately- doing anything else can destroy the engine and kill whoever is near it.
Click to expand...
I have a spare IP that my friend sent me (some of you may know him from TikTok: https://www.tiktok.com/@thatdirty6.2detroit?_t=ZT-8uKnfCNweuQ&_r=1 )

I've been wanting to rule out air intrusion, but, I suppose the IP truly is going out, unfortunately
 
nycxjeremyy said:
If anyone has a diagram for this, I'd really come in hand
Click to expand...
These are your injector return lines. they all just loop from one injector to the next. the last two are plugged off. the first injector connects to the return steel line that tee's into the IP retrun as well and the other bank of injectors. then runs up under the intake to the back of the engine where it then connects to a larger hose then travels back to the tank.
 
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