in the z22se we are using ( vectra a, vx=speedster, astra g, zafira a ) there is no camshaft sensor ,
there is only the crank sensor.
yes and knock sensor
normely its better to have camshaft sensor because ignition will know to witch spark plag shell the next exlosion go, example: to the 1 or the 3 cylinder.....oh my english,sorry
because the ignition don't know it on our engine the ignition give the explosion to booth cylinder ( 1 and 3) at same time.
and because there is a differen't of the needed electrical power the ignition knows it yet witch cylinder is the next one
sorry, i can't explane it better. my be have a look here, but its in germen
http://www.zafira-forum.de/showthread.p ... ment+z22se