Bad Cam Position Sensor?

Takes a bit for my tach to move when starting it. And during idel after starting you can see the rpms bouncing up/down a little bit. These rpms coincide with the vibrations

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Camshaft Position Sensor P0340 Testing and Replacement HD
Click Here to Subscribe! Website: Today we're testing the camshaft position sensor, along with its harness connector. The sensor consists of a permanent magnet, core and coil. When the engine is running, the gap between the sensor and cam sprocket will periodically change. This generates a voltage and sends the information to the ECM. Code P0340 could be generated by the following reasons: - Harness or connectors is open or shorted. - Camshaft position sensor - Starter motor / starting system circuit. Tools Used: Safety Glasses 10mm wrench Digital Multimeter (DMM) Starter Replacement Video: Note: This video is being performed by an experienced tech. Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, use safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Publication, reproduction or distribution of this film is strictly prohibited. This was performed on a 1997 Nissan Maxima. Please check with your vehicle's repair manual for testing parameters.

Check Engine Light and Cam Sensor - AutoZone Car Care e-Reader/_/N-25iq In the third installment of the AutoZone Complete Car Care - Check Engine Light Series, Bruce Bonebrake shows you how to troubleshoot the Camshaft Position Sensor. Learn how to use this information to diagnose and target the cause of your vehicle's check engine light warning.

Crank Sensor Quick Fix
GET SOFTWARE HERE: Crank Sensor Quick-Fix There are two types of crank sensors, and two types of tests, the 2 and 3 wire sensors. Here are the flash points for the crank sensor testing. 1) The 2 wire crank sensor generates a voltage, and is quick tested with a test light. 2) To test the two wire sensor, disconnect the crank sensor, ignition key on, hook the test light to battery power, and tap at each crank sensor terminal repeatedly. A spark click and injector pulse should be seen. 3) The 3 wire sensor has its own circuit, with 5 to 8 volt power, ground, and signal wires. Identify the signal wire using volt meter or diagram. 4) Take the test light and connect to battery ground. With key on, disconnect crank sensor, and repeatedly tap on the signal wire. You should hear a spark click and injector noid pulse. These are to test the ECM crank sensor circuit response. On both tests, you should see a spark click and injector pulse. Crank sensor is the main input to the ECM. If ECM working, then the crank is the only other issue. There are other ways to test, but involve an oscilloscope and more complex. This concludes the cranks sensor Quick-Fix.

How To Check Crank Shaft Position Sensor
I accidently damaged the Ckp sensor on the Hyundai when changing the timing belt. I take full responsibility, and show how to make sure the wiring is good and sensor is at fault.