Ok so i got the Ecu, P28, socketed by HandCommand... he is a user on here.

now i need to know what all i need to convert my 99si to obd2. I have the ECU, and the Harness at this point. Im getting the skunk2 test pipe this week... So i need to swap anything else? sensors, Intake Manifold?

Thanks in advance.

 

you mean converted to obd-1. your 99 SI is already obd-2. all you need now is a jumper from obd-2b to obd-1

 

Your Si is already OBD2. You need a conversion harness to convert to OBD1 though.

 

i know i need the jumper harness, that i will be getting from JHPusa.com... Do i need anything else? like manifold or any of that stuff?