Safarifriends.org

This may be air in the input fuel feed line from the tank. I had this and just changed out the lines. My 3126B would not run above 1,000 rpm I traced it to a breakdown in the fuel line. The line is under a vacuum. To see if this a problem insert a clear poly diesel line before the first filter. You need a 1/2" hose mender barb. Here are my pictures. You won't have the extra filter but you should not see a partially filled hose. If you see excess bubbles the you have an air leak, there should be none. The air collects at the top of the filter and can starve the engine. Here are my pictures, you can see how to connect this although slightly different from yours.

This is before the line change out. The line is half full with a foam.

map40 wrote: ↑Mon Nov 16, 2020 4:21 pm\ Not the exhaust brake sounds like a good option. If did act like when you activate the "jake brake" without activating the brake in the allison transmission (don't ask me how I know, is a long story). It was simply not giving me power. It was hanging at 2000 RPM or lower, and the transmission was acting like I was not accelerating. So maybe a loose wire or something like that.

To be clear, is that first word NOT or do you mean NOW.

If a PacBrake, when was it last lubed? Have you verified that when this loss of power occurs that the piston that closes the exhaust brake flap is in its fully retracted position so the flap is in the full open position.

PacBrake service: https://pacbrake.com/product/c18037-superlube/

wolfe10 wrote: ↑Tue Nov 17, 2020 7:10 am

map40 wrote: ↑Mon Nov 16, 2020 4:21 pm\ Not the exhaust brake sounds like a good option. If did act like when you activate the "jake brake" without activating the brake in the allison transmission (don't ask me how I know, is a long story). It was simply not giving me power. It was hanging at 2000 RPM or lower, and the transmission was acting like I was not accelerating. So maybe a loose wire or something like that.

To be clear, is that first word NOT or do you mean NOW.

If a PacBrake, when was it last lubed? Have you verified that when this loss of power occurs that the piston that closes the exhaust brake flap is in its fully retracted position so the flap is in the full open position.

PacBrake service: https://pacbrake.com/product/c18037-superlube/

Here is a video of the lubrication points of the Pacbrake. Start at one minute into the video to skip the talking head.
https://www.youtube.com/watch?v=E_wX98sHBpU&t=32s