So how would I diagnose if there is one of the bad remans? Just send them all back? Or would you suggest to put a new fuel filter in and a fresh tank of diesel with some diesel kleen?

 

Well, only one way you test them is with an ohm meter. You can test from the 2 wide plugs that plug on to the valve cover gasket. Test 2 tab at a time that create an a circuit. This just to see if the solenoid are in shape. But as for the mechanical components, there is no way of testing yourself, got to send them to a fuel or injector shop, only way.
But one thing you can do though, that cummins have suggested before to me but I was working on heavy equipment, someone can do use an temperature probe or a inferred temp gun, and measure the heat on the exhaust manifold from each of the 6 ports. You can see if one port is cooler then all other, once when engine is cold and engine at hot. For me it didn't help me in my issue at the time, but if one cylinder is not combusting properly won't give out as much heat.
So you can give it a shot. But sending them back, would be nice if their willing to take them all back though, but they would probably test them and give you back the good ones. But this is your call. My first time buying remans I had no problem, but the second time after few month then got a problem again. Then I learned to avoid them, but again up to you.

But your theory with bad fuel.... Maybe a bad batch of fuel...Is a possibility but I had never see it or heard of it, that it creates white smoke. But I guest if there is a lot of water or something. And change your filter is definitely a good idea. But doing this Doesn't hurt so I would try.

 

Ok I will Ohm them all tonight but usually wouldn't it set a DTC if the electrical side was the problem? And I have an IR Gun that I could use but where on the pipe exactly do you want me to test? and what is considered normal? And anew thing popped up now it has an extended crank after putting the last 2 injectors in? It looses its prime in about 15-30 mins?

 

Dang you got air going in, so whatever injectors you pulled out before the problem, I would pull apart again, maybe your injector tubes may have burrs on the tip of. Or before that check that the lines are tight too. Hey have you disconnected any fuel lines in around your injection pump? Leak can come from there.

The injectors, may not always throw off a dtc unless you got the dealers diagnostic tool, they may retrieve it. The cheap code reader we get at the part store, sometime don't or can't retrieve certain codes. That is the real case on the fords though but dodge, wouldn't be supprized it's the same thing.
So for the heat test, just measure the heat of the cylinders exhaust port on the exhaust manifold closest to the cylinder head. Do this quick as the truck warms up, but maybe better once the truck is warmed up at its normal temp, but I d do both though. So to know the culprit, you just take the difference in heat of each one port and compare it to each one. Say port 1 is at 430F port 2 is 450F port 3 is 320F and 4 is 460 and etc. Then you know something is up with cylinder 3. There is no specific temp your looking for, just difference.

 

Ok yea I put the injectors in one at a time except for the last too which happen to be number 1 and 4. Could that be a cause of the white smoke or just extended crank? And the reason I asked about the IR Gun test was because I did do it originally when I put the first injector in for being the different one by about 30 degrees and then it didn't fix it so I thought I was doing something wrong and if I was able to drive the truck I could take it to work where our used car lot has an expensive scanner. Yea I'm a GM Master tech and my dodge has got me stumped right now and it is driving me crazy!

 

To confirm, you had white smoke since the beginning then you start changing them. But did you change all 6 injector or at this point you changed them except for 1 & 4?
And these remans did they come with new o-ring and copper washers? Did you put new connector tubes too? When your changing the injectors, did you look closely inside the injector housing for Pitting or cracks?
Because what I'm thinking is that with no real change in performance and your white smoke increases with then engine reaching operating temp (so with heat expansion, more fuel is dumping in the combustion chamber) So either a bad copper washer (but all is changed shouldn't be the problem), cracked injector (but if all is changed shouldnt be the problem either) or the injector housing has a crack or deep scratches in it
This can cause for longer cranking too.

 

Yea you are right I had white smoke starting in August started replacing the injectors one by one while the truck sat and I put then in like this 5 then 3 then 2 then 6 then 1&4 at the same time. The reasoning for that is because 5 had high IR reading. 2&3 had a very clacking sound with a stethoscope while the others sounded normal and I did 6 just because I was starting to replace all and the same with 1&4. Then after 1&4 I had an extended crank. But more performance like a lot more. I had lower egts upon driving it at operating temp. But still the white smoke which starts out when you turn the truck on and the hotter you get it the more it smokes

 

The injectors I used were GB REMANUFACTURING 712502 from rock auto and they came with new copper washers and the old ones came out and I looked in the holes and didn't see that I was double washering. And they came with o rings for the feed tubes which I installed in each one and I re used the feed tubes and I cleaned them off with a rag from dirt or grime and the 1&4 had a little rust/corrosion around the high pressure pipes which I cleaned with a razor blade really carefully and those were the only 2 that had that

 

Ok well, if I'm thinking right, and I hope I'm right, you might have the problem fixed. But let me ask, since the moment you notice better performance, how much running time did it run? 30mins, 1 hr, 2 hrs. If no more then that, then you might have left over fuel in the exhaust left behind by the injector that leaked, and once you run the engine and it heats up white smoke will appear and more so when warm.
But your long start, maybe those pipe, so might have to change them. But as for connectors tubes, cummins recommends that they are change with the injectors. Cause each injector aren't always perfect/same from each other. So when a new tip of a connector tube connects to an injector, it initially conforms to that injector so to make sure to form a perfect seal. So if a connector is re-used for a new injector, it's form with old injector may not match the new injector to make that perfect seal, then in turn, may leak and cause longer starts.

 

So I hope I'm right, with the white smoke. that has happen to me when once with one of the company I've worked for, an injector tip blew, and dump fuel for who know how long, then the engine need a major overhaul but after we were done it smoked white for hours, then slowly disappeared