Gm Tbi Iac Wiring Diagram. Tbi 350 installation land cruiser tech from ih8mud size. Holley carburetors have powered every nascar sprint cup team and nearly every nhra prostock champion for four decades.
A1 grnwht this wire is used to energize the fuel pump relay. A2 not used a3 not used a4 gry to egr relay. 87 chevy tbi wiring diagram.
The schematic below shows how such a motor is wired.
Index of wiring diagrams. First the big picture block diagram. Index of wiring diagrams. Ok that explains why when i did those steps with the iac out of the tbi the pindle came all the way out and shot off.