My car has been acting very unusual lately. It will die out then refuse to start and the theft light will blink and the pcm makes this buzzing noise. It also bucks a lot when cruising sometimes. I was thinkin its the tps cuz someone said they had the same symptom but had a code as well. I have no codes but I do know the iac needs cleaning. Also I changed the fuel filter and plugs months ago. When the car dies and the pcm makes the buzzin noise the odometer is just dash lines. Does anyone have a clue what this may be?