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Mike F · 05-01-2007, 06:03 PM

NO the GM TBI setup uses the IAC to maintain idle at all temperatures and conditions along with a dozen other modes of control at other RPMs.

GM TBI does not use a crank sensor, the motor has a distributor along with a ignition module that sends a signal to the ecm that takes it and looks at the operating condition and decides how much spark advance is needed and sends a signal back to the ignition module to trigger the coil like any older electronic ignition.

GM TBI only has temperature, oxygen, knock, MAP, TPS, and speed sensors.

I can program older GM TBI systems and have set them up to run other brands of motors such as the AMC V8.

05-01-2007, 06:03 PM	#2
Mike F EFI AMC 360 Join Date: Mar 2007 Location: New Lebanon, OH Posts: 32	NO the GM TBI setup uses the IAC to maintain idle at all temperatures and conditions along with a dozen other modes of control at other RPMs. GM TBI does not use a crank sensor, the motor has a distributor along with a ignition module that sends a signal to the ecm that takes it and looks at the operating condition and decides how much spark advance is needed and sends a signal back to the ignition module to trigger the coil like any older electronic ignition. GM TBI only has temperature, oxygen, knock, MAP, TPS, and speed sensors. I can program older GM TBI systems and have set them up to run other brands of motors such as the AMC V8. __________________ 89 YJ EFI AMC 360, T18a, D20, built D44, 14 bolt, 38" Creepy Crawlers.