1999 Opel corsa 1.0 had problems with power was like no acceleration changed the air flow meter got revs back but now when driving after 15 minutes car cuts out won't start take between 15 an 30 minutes to wat I would say cool down abit then then start no problem for maybe 10 minutes then cut out again when it got too hot I've been told this could be the crank position sensor could any shed some light to weather this could b the problem if do where would it be located