3406e cold start misfire...

Having issues with my 1996 Kw w900
Has a early 3406E. To make a long story short. I started my truck about two weeks ago in the morning and when it started it had a hard misfire and a lot of smoke. The smoke is blueish and after 10 or so minutes it kinda clears up but it's smoking blue. When I take off down the road an the truck warms up to operating temp the miss is gone and no smoke. So I had the CAT mechanic plus into my truck and did a cylinders cut out test. Found the #5 cylinder was missing. So i replaced #5 injector and had no change at all. Still same symptoms in the morning and after coming off a big hill with the Jake on it would studder and miss then clear up. Had the CAT guy look at it again and run another cylinder cut out test and said the #1 injector was bad. Replaced that and still have the same issues. I have checked the check valve in the fuel pump and also another check valve in this fuel block deal that loacted right next to my fuel filter. I didn't find anything wrong that I could tell. Wondering if my

 

I have done the cylinder cut out test when it's cold and the number 5 cylinder is the one that's missing when cold. I replaced the number 5 cylinder injector and still am having the same problem. Last week before I replaced the #5 injector I had the CAT guy plug into my truck after it had been running all day and he did a injector test and told me the number 1 injector was bad. I have looked over all the wiring on the engine going to the ECM and from what I can see it's in good shape. So rubbed wires or anything like that. Guess I'm still wondering if it could be the ECM going out? If it was the ECM I would think it would miss all the time? Thanks