The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 72 all wired with tbi couple of questions

71sixgun · 04-30-2013, 07:40 PM

Did you say that you do not have the wiring connected for the diagnostic port? If so, I would definitely hook it up. Diagnostic port is your best friend for OBD systems. What did the donor vehicle have for emissions, EGR, smog pump, Evap canister, and is all of that in place now? If they aren't and the ECU is still searching for input from them, then its not going to run right; ECU's can be reprogrammed though. TBI's can be finicky, but run nice when they are all correct.

04-30-2013, 07:40 PM	#15
71sixgun Registered User Join Date: Mar 2013 Location: Clifton, Maine Posts: 86	Re: 72 all wired with tbi couple of questions Did you say that you do not have the wiring connected for the diagnostic port? If so, I would definitely hook it up. Diagnostic port is your best friend for OBD systems. What did the donor vehicle have for emissions, EGR, smog pump, Evap canister, and is all of that in place now? If they aren't and the ECU is still searching for input from them, then its not going to run right; ECU's can be reprogrammed though. TBI's can be finicky, but run nice when they are all correct.