Air Induction System Precautions
AIR INDUCTION SYSTEM1. Make sure that the oil dipstick, oil filler cap, Positive Crankcase Ventilation (PCV) hose, etc., are all securely fitted, otherwise the engine may run out of tune.
2. Disconnection, looseness or cracks in the parts of the induction system between the throttle body and cylinder head will allow air suction and cause the engine to run out of tune.