alright so i have a 90ls motor in my 91 dx, so the guy before me converted it 2 MPFI, but i dont think he soldered the connections, just crimped n tape. looks pretty messy and my car lags. but what i was wondering is if i get a engine wiring harness for a 90-91 ls motor, and then get the wiring harness that connects the ecu to the motor, could i just rip out the wiring this guy did and just plug everything in w/o a problem????