just a quick question.. i just recently got my clutch replaced on my car and the engine hasnt been turned on for almost a week and it has been pretty cold where i live.. now i turned on the car today to take it for a drive and the idle was way low.. the car began knocking around like it was gonna stall out.. could it be dirty fuel injectors? i just got an oil change and a new oil level sensor.. so any info would be helpful thanks