I talked with tpi specialties today after I aw a article on how to do this in my tpi conversion manual that came with my harness, this is on a 90 ecm, but should work on all others as well, they said to ground the orange wire with a black stripe that goes to the nuetral start switch on a autiomatic f-body, grounding this wire will cause the ecm not to expect a vss signal ..... I did it to my car today but didn't have time to drive it, tomorrow Im registering the car and will tell you if its a success or leads to other problems