The cam sensor pickup is at about the 11:00 O'Clock position relative to the crankshaft pulley, and the 7 O'Clock position relative to the water pump pulley. It senses the passing of an interrupter magnet that snaps into a hole on the backside (engine side) of the camshaft gear right behind the front cover. The pickup costs about $20 and is held in place by a 10mm head bolt. Remove the bolt, then pull and wiggle the sensor out. It has an o-ring on it to seal the oil in the front cover. With the sensor out, get a mechanic'* mirror and a flashlight. Shine the light onto the mirror and into the hole and you will be able to see the cam gear. Turn the motor around by hand (two crank revolutions for one cam revolution) looking for the interrupter magnet. If you find nothing but a hole or broken pieces of plastic, you will need to install a new magnet ,about $8. You do that the "right" way by removing the timing cover and inserting it from the backside of the gear. Or search this site for "cam sensor padgett" for an alternate method. Hey, maybe the electrical connection to the sensor is just loose!