do i need this for my swap?

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mrnice1058

Senior Member
http://www.psychorc.com/ht/tn_b18%20011.jpg

OK they told me that it is an injector resistor box but I have one but I got my engine from a 91 SiR with a b16a I converted everything to run for my obd2 car, and I have an obd1 ecu with a jumper harness, what does this injector resistor box do?
 
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