3406 DITA not firing on all cylinders

sounds like bad injectors or stuck engine brake. so while you have it appart. and you are checking the top end. you might want to go ahead and replace the wiring harness for the injectors and engine brake. a new wiring harness is a couple of hundred dollars. and about 8 hours to install it. and it's worth it to replace it now. the 3406 cats have a problem with the wiring harness in the head going out. and causeing miss fires or dead injectors. so if you have the old engine out of the truck. you will want to keep the engine brakes and injectors off of it.

 

If its a 3406A DITA it will be all mechanical except jakes. I do agree if its ticking under the cover pull it and make sure nothing is stuck or loose. Then run engine and crack fuel lines coming out of pump to injector one at a time. You will notice a pronounced miss when you crack a line on a good cylinder. Pay very close attention to hwo far open you turn each nut and how much fuel squirts out. If the ones missing are spraying out noticeably less fuel problem is most likely in the plungers in the pump. If amount of fuel is about the same its probably injectors. When those engines set up any rust that is in the pump body can come loose and usually stops up the plunger or gathers on top of injector where line connects, either way usually just a dissassemble and clean up does the trick.

 

I would pull nozzles again and take them to a fuel injection shop to be tested. If a nozzle was leaking compression due to not sealing it could make a ticking noise for sure. Also I would install correct nozzles per engine serial number its possible to have the wrong spray pattern. If nozzles test good all you can do is a compression test at that point.

 

Hey wore out- what transmission do you really have? Eaton never made an 1800 series RTOO. Sorry not trying to hijack.
jorlee whats the serial number on the engine? I look it up and see what injectors it calls for.

 

RT0014613 didn't realize it said 18 instead of 16 shows what kind of attention I pay. FWIW I turned mine around its not a factory Eaton RTOO.

 

Ok. Saw what you said and wondered if it was somehow a custom updated version that somebody came up with. RTOO's are fast for sure. I miss mine. I'm just running an 18 speed now and I sure miss that last big hole that the RTOO has.