Cummins ntc 350 miss

I have a NTC 350 big cam Cummins that will miss. It is around 1400-1500rpm. It is very intermittent maybe only 1 or 2 times every 200-300mi in the city. I did a recent inframe with rebuilt injectors. I didn't replace the turbo, but there is no oil in the intake and it makes 17-18lbs as it should. It runs great other than this. No overheating, good oil pressure. It is kind of odd, if it was constant I would think it would be one of the injectors but with this so intermittent??? I think it may have a boost leak but can't find one. The needle on the boost gauge vibrates when over 10lbs. I just replaced all the intake boots. All the cylinder temps are within 20 degrees of each other. It recently started missing. It has maybe 3000 miles on the inframe. The engine is in a 1987 ford ltl9000.

 

The injectors were rebuilt by a local shop and tested after the rebuild. The heads were also checked for leakage and were fine. When it hesitates it is like a cough. Real quick like it only drops a cylinder or two then it is back to normal. I dont lift or back off at all. It is similar to a gas engine how they backfire some after a free rev. I think that is the best description. Obviously this is only on acceleration. The cam was checked for flat spots. It is intermittent. It is already over befor i have a chance to lift and the motor just drives right through it. There is a loss of power but the whole event lasts less than a second

 

I will check out the wire to the solenoid this week. Thanks for the advice. It just seems like it would be something mechanical. I have had bad solenoids on other cummins motors and none of them acted like this. I guess every situation is different. All the fuel lines still look good on the outside not that that mean a lot. But if it was a collapsed line I would expect it to act like it was starving at higher rpms. It is so strange it is just a intermittent burp every now and then. I guess if worse comes to worse I could wait till it gets worse. Another odd thing that I have never seen happen is when I have a full tank of fuel it will build pressure in the tank. This will cause the RPM to idle up some like 50rpm or so. Not sure if its related. I guess maybe I am filling the tank to high. The level in the tank does not effect the miss.