My N14 Has Gone Through Ten Injectors Within a Year

Hello. As the title indicates my N14 has gone through ten injectors in a year’s time. I’ve had it to four different garages, and no one can come up with a solution. I’ve gotten Cummins involved. They admit to having a questionable batch of injectors come through in the last couple of years, but they’ve never seen anything like this. I don’t want to give up on the tractor, but I am at my wits end. I’ve always heard amazing things about these engines. Did I just get a lemon? For reference the engine is in a 2000 Kenworth K100E. It’s a Celect Plus red top. Engine year is 1999. Thanks for your help. I will answer any questions you have to the best of my ability.

 

RX and PX. They were all Cummins injectors. Another R and P failed.

 

I’ll call and ask if they are familiar with the issue.

 

One shop has suggested that the problem is electrical. In cut out tests at idle, the injectors simply aren’t contributing to the firing of the engine. Replace the injectors and the problem is resolved, for a while. The two I’ve taken in for failure analysis show no signs of water in the fuel. They just had very low output. There was no sign of mechanical problems in the injector, although I’m not certain how thorough they were in taking them apart. It was suggested that air is getting into the system somewhere. But I’ve had several shops find what they thought was the point where air was getting in, shored it up, and sent me on my way. Recently I had a shop suggest an updated ECM package that comes with a new camshaft. A couple more suggested cavitation may be occurring.