Just been reading through Rave and a few other manuals and it seems that on the 75/ZT the cam sensor is only use at startup, and once running is not referenced by the ECU.
Based on this and your symptoms if it starts up from cold every time I'd check the crankshaft sensor first. 
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S. Wales meets cancelled until further notice
[SIGPIC]https://www.the75andztclub.co.uk/forum/image.php?u=23989&type=sigpic&dateline=1467731033[/SIGPIC]
Past cars:-
BL: Discovery 3.1 & V8 2WD pick-up, Rover 800 Vitesse Turbo Coupe, 820 SLi 180 Fastback, 600ti, Montego 2.0EFi VDP, Ital 1.3 Estate
Ford: Transit Cosworth V6, Granada 2.9 V6 Scorpio & 2.8 V6 GL
Volvo: 480 Turbo & 1.7 ES, 240 GLE
Porsche: 944 2.7 Lux
Audi: 100 ESE 20v
Peugeot: 405 1.9 GR
Talbot: Alpine 1.6 Rapier S
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