I have a '94 XJS Jaguar that has been having repeated issues starting and has lately been putting out a dramatic plume of grey smoke each time has actually succeeded in starting. Currently, the engine refuses to turnover (or even give the usual “crank”); however, all the electrics in the car - lights, radio etc - seem to work perfectly fine. Attempts to jump the car have proved futile. Previous trips to the repair shop have included battery replacements, battery cable replacements, tightening of this, that and the other thing as well as a transmission cleaning, all to no avail. Would anyone have an idea of what the issue might be? Further, does anyone know of good LA mechanic that specializes in older Jaguar models?