95 Q45 car cranks but won't start replaced starter, ign coil, alt, MAf? Help!

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I've replaced the alternator, starter, fuel pump, ignition coil, MAf, battery, radiator, 3 belts, every fuse, inside and in engine compartment, I've been told to check the cam timing sensor but have no clue where to find it or what it looks like. But a year ago I didn't know where the starter was either. Thanks to these forums and nico, but I really need and want to get this car back on the road I've sunk to much $ and sweat equity to let it beat me. Any help will be greatly appreciated.