Hi,xj8 3.2 non start.Appear to have pressure at rail, injectors squirting, spark from plugs.
The only thing unsure of is throttle body, as the butterfly on top is always closed no matter where throttle pedal is put.Stepper motor hums and moves butterfly a fraction but never fully open.???????????
Have removed plugs and gapped and introduced squirt of oil in bores, to no avail.HELP??????????????

 

Read upon "throttle by wire!"

 

Where would that be please ????

 

Google?
Your car controls the throttle plate position via an electical control circuit!