[V]

there are several model number for tpi ecms, but they are year specific for the most part. 86-88, 89, and 90-92 i believe. first was mass air setup, then mass air with no cold start then finally speed density. Engine size was determined only by the chips plugged into the ecm. in the 90-92 V6 3.1L cars the ecm is the same one as the 90-92 TPIs, just different chips.

as for the fuel issue, yes, i would suggest swapping out the fuel pump relay. its right on the drivers corner under the hood. Perhaps its sticking, and the slamming of the door would help release it. It doesnt hurt to try first.