GM Truck Throttle Body Injection 4.3, 5.0, 5.7, 7.4 Engines 1985-91
(w/o the 4L60-E or 4L80-E transmissions)
Our harness upgrades to the 1988-90 CK truck computer. Two fuel injectors mounted on top of the throttle body inject fuel into the motor. GM uses most of the same sensors on a throttle body as they do a tuned port engine. Throttle body injection uses a M.A.P. sensor for fuel calibration. This computer controls the engine only, an electric shift transmission which GM started using in 1991 cannot be used with this computer. The transmission types available were 70OR4, Turbo-400, Turbo 350 and manual transmissions. Requires 1988-1990 CK Truck Computer, Prom and Cal-Pack.
(w/o the 4L60-E or 4L80-E transmissions)
Our harness upgrades to the 1988-90 CK truck computer. Two fuel injectors mounted on top of the throttle body inject fuel into the motor. GM uses most of the same sensors on a throttle body as they do a tuned port engine. Throttle body injection uses a M.A.P. sensor for fuel calibration. This computer controls the engine only, an electric shift transmission which GM started using in 1991 cannot be used with this computer. The transmission types available were 70OR4, Turbo-400, Turbo 350 and manual transmissions. Requires 1988-1990 CK Truck Computer, Prom and Cal-Pack.
