Note the above wiring diagram shows one difference from how I wired things up- this shows how to use a 2-wire narrowband o2 sensor.. When using a factory GM TBI system the regulator is built right into the TBI unit itself.. Throttle Body Injection (TBI) EFI Hardware. Junkyard TBI unit from 1992 GMC 2500 Van with 350 Motor Included.. The GM TBI Wiring Diagram is one of the most comprehensive diagrams available for auto-repair professionals and enthusiasts. It provides detailed instructions on how to use the various components of a TBI system, which includes the distributor, spark plugs, fuel injectors, and more.. Mercruiser 5 7l Efi Mie Gm 350 V 8 1997 Wiring Harness.
Troubleshooting and Common Issues in GM TBI Wiring. The GM TBI (Throttle Body Injection) system is a popular fuel injection system used in General Motors vehicles from the 1980s to the mid-1990s. While this system is relatively simple compared to more modern fuel injection systems, it can still present its own set of challenges and issues.. Shown below are installation instructions for a variety of our products and services. Simply click the document you wish to view. To download, right click the link and select SAVE AS to your computer. TBI (Throttle Body Injection) TPI/LT1 (Tuned Port Injection) Vortec/LS1 Other