ok,I ned you to do this relearn listed below before we can go further,so do this and let me know if that helped ,,,,
CRANKSHAFT POSITION SENSOR (CKP) SYSTEM VARIATION LEARN PROCEDURE IMPORTANT: A Crankshaft Position System Variation Learning Procedure must be performed any time a change is made to the crankshaft sensor to crankshaft relationship. Changing the crank sensor to crankshaft relationship will not allow the PCM to detect misfire at all speeds and loads accurately. Resulting in a possible false misfire DTC being set. Removing a part for inspection and then reinstalling the same part is considered a disturbance. A false DTC P0300 could be set if this procedure is not performed.The learn procedure is required after the following service procedures have been performed, regardless of whether or not DTC P1336 is set:
CAUTION: Before performing the Crankshaft Position System Variation Learning Procedure always set the vehicle parking brake and block the drive wheels in order to prevent personal injury. Release the throttle immediately when the engine starts to decelerate in order to eliminate over revving the engine. Once the learn procedure is completed, the control module will return engine control to the operator and the engine will respond to the throttle position. IMPORTANT: The battery must be fully charged and in good condition. The scan tool connection at the DLC is clean and tight before starting the Crankshaft Position System Variation Learning Procedure.
also there could be a problem with the air flow meter ,you can try and clean the sensor by spraying it with carb cleaner and using shop air ,blow it dry then reinstall it ,this may be the problem as dirt will often get on the resistor wire(s) in the sensor ...guy...