TRY CLEANING YOUR MAFS AND YOUR CRANK SENSOR GO BUY A CAN OF CRC MAF CLEANERS AND USE IT ON BOTH THERE ARE VIDEOS ON YOUTUBE ON HOW TO DO IT.
ITS CHEAP AND WONT TAKE LONG IF YOUD LIKE YOU CAN ALSO LOOK INTO THE THROTTLE BODY SEE IF THERE IS OIL OR ANY RESIDUE IF THERE IS SPRAY A CONTROLLED AMOUNT OF CRC IN THERE AND TAKE YOUR TOOTHBRUSH AND SCRUB DONT SPRAY TO MUCH INSIDE AS IT MAY BE DIFFICULT TO START IT UP. THIS WILL TUNE UP YOUR INTAKE SYSTEM YOUR CRANK POSITION SENSOR IS LOCATED RIGHT BEHIND YOUR CRANK PULLY SPRAY AND CLEAN NOTE IT COUNTS TEETH ON PULLEY AND NORMALLY GET OILY...RMBR ENGINE MISFIRES THROW UP A ENGINE CODE RIGHT AWAY SO ITS PROBABLY NOT COILS OR PLUGS. GOODLUCK