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88turboii · 11-12-2013, 07:13 AM

3B is the 12V starter input signal for the ECU, it lets the ecu know you are trying to start the engine. im not exactly sure how it works, but the ecu may use this to use a priming fuel map instead of the base map. could be the reason your not starting

im not familiar with FB's, but you could wire it into the same wire that goes to the starter solenoid

11-12-2013, 07:13 AM	#2
88turboii destroy, rebuild, repeat Join Date: Feb 2008 Location: Charleston, SC Posts: 395 Rep Power: 18	3B is the 12V starter input signal for the ECU, it lets the ecu know you are trying to start the engine. im not exactly sure how it works, but the ecu may use this to use a priming fuel map instead of the base map. could be the reason your not starting im not familiar with FB's, but you could wire it into the same wire that goes to the starter solenoid __________________ 1993 RX-7 Touring MB, stockport 13B-REW, 9.4CR rotors, T04S 60-1/p-trim single turbo 1986 RX-7 Base project track beast