Attempt at test running a Magnum

DionR said

I swapped a 5.9 Magnum in the place of my ‘91 318 TBI motor in my Dakota and used the same pump and tank. I checked the part numbers and they interchanged. The pump doesn’t have the FPR on it so pressure is controlled at the rail or TBI, and adjusted accordingly.

There are issues though depending on what year PCM as they went to a returnless style system and had a FPR on the pump. My 5.9 PCM is from that era, so I just made sure the static pressure matched and left the vacuum hose disconnected so pressure was constant like the PCM expected.

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You know, I didn't think about needing a different PCM for a return style or returnless fuel system. The Dakota was returnless and the van was return style. I have the PCM's from both.
I tried both since they're easy enough to swap. The only difference I noticed was the Dakota PCM made the upshift light come on with the key on. It was a 5 speed truck.

Something that might be related is that have the van's a518 automatic, flywheel, and crank position sensor on the motor now. The Dakota CPS plug would not fit into the connector. I spliced the van's connector on and the wires are the same colors. Do you think there's a problem with the CPS? Also, there was no tach movement while cranking.