Cm2350 leak down failed

[Tony]

So I started off retorquing the injector tube nuts and fuel lines but still failed the leak down test.

I ended up purchasing (3) 20mm fuel line caps off of Amazon for about $16 a piece. Instead of $140/piece from stealership... I was worried they would be crap but worked awesome.

The engine ran smoother then I anticipated on 3 cylinders.

I ended up narrowing it down to my #5 injector. With #5 capped off the leak down test only dropped 1k psi in a min.

So I know to only use a genuine cummins injector, dealership was about $1450 +core. I will be installing it next weekend unless anyone knows where I can get one for a better price.. lol (only genuine cummins)