3406b cat question?

A dead miss will always cause an imbalance but you'll likely be ok bobtailing 50 miles.

 

Why don't you just drive it the way it is 50 miles? I drove to a shop with engine knocking after Great Lakes Diesel worked on mine back in the '90s with warped 1 & 6 pistons. Just keep your foot out of it.

Have you called any tow trucks and got a quote?

$300 is what my local guy gets to winch me out of my field when I get the stupid bug and the ground is soft in the winter. He travels about 25 miles to get here.

 

I would not cap off the line or fuel pump, Like they say it might damage your fuel system. A fuel nozzle might work, does the truck smoke????? that nozzle might be over fueling causing a fuel knock??? If it does smoke does the smoke go away when you crack that line loose????

 

Some smoke on a 3406b is norm, sounds like you might have some internal problems, Now drive it 50 miles is not a good ideal, It might make it or not. If the piston is starting to seize or a valve about to drop it will cost more in repair then a tow to the shop. I seen alot of dropped valves and seized pistons. I have seen a c12 with a broken wrist pin that came apart and the rod ripped the block in half. A new pack and maybe a new head is a lot cheaper then a new engine.

 

You can rebuilt it, but I work for a cat dealer and we have cranes to lift heads, tooling to adjust jakes or pacbrakes and not all brakes are adjusted to the same spec.. It depends on brake models and horespower ratings. If we rebuilt it (OPT) we go through everything and cat offers warranties. Even if you did bear minimum with a dealer, and something happens to what you replaced/repaired, you will get coverage. If some thing happens like you mix up washers on the jakes or adjust the valves to the wrong spec. and it dropped a valve your up sh#t creek with out a paddle.
There is also a chance that it might not be as bad as you think. It might be something that can be fixed with out taking it apart. I see that all the time, I had a 3126 in the shop today with crank no start and the guy replaced 2 sensors and a HUEI pump and I towed it into the shop. It had all 6 logged injector codes. Be a cat tech for around 8-9 years I know that is a ECM problem, installed test ECM and the truck started. trouble shoot it and repaired it in 4 hours.

 

This tells me that the injection pump builds enough pressure at that rpm to get the fuel to atomize so the knock lessens. Mechanical failures don't usually go away with rpm, also the fact that you have an unburnt fuel smell even more so makes me think it is fuel related.