I took my '04 6.0L F350 to a certified repair shop to replace the head gaskets and install ARP headstuds. the truck ran fine around town without a load on it, but when you went to pull with the truck it would "whistle" and blow coolant out, this is the reason it went into the shop. when he got it back together it was blowing black smoke and running very rough. 3X the computer said said the #1 injector was bad, so he sent it out for testing and yes the #1 injector tested bad, so he replaced it with an OEM part... it still runs very rough, no power, black smoke...
Does anybody have any ideas?? or direction?

 

I just want to be clear here, did it do this after you already had headstuds put on there or was that the reason that you took it into the shop in the first place? Or did it do it after you got the headstuds on there?



EGR and/or EGR Cooler might be the culprit here. Do you have an EGT gauge? If those are spiking more then they should given how you're driving and where you are driving, then I would be more sure that it's one or both of those going out on you.

 

The truck ran fine before the headstuds, it isn't out of the shop yet. it is running so rough that it basicly won't move. No EGT gauge. EGR cooler was blocked also during repair.