Fitting a 4.0 litre AJ6 motor in a 1983 3.5 litre XJS club track day car. This motor was a warranty standby motor that was never used.
This video shows the first ever startup of this motor using a Haltech Elite 2500 ECU.
The video also details the modifications needed to run the engine, with coil over plug packs, stepper motor idle control, wide band oxygen sensor and knock sensors etc.
