The year and make of the truck is a 1993 with a 4.0 v6 with a five speed manual. Engine was swapped out about 15 years ago. We are assuming the swapped out engine is somewhere around a 1992. Truck is running but rough at highway speed and shows a code 33. With further investigation shows it is A EGR valve or a DPFE sensor problem, we also see that this engine does not have an EGR valve or DPFE sensor. My computer is trying to read something that is not there. The ECM is the original truck ECM. Any help appreciated!
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