What happens if you have a vacuum sensor leak?
What happens if you have a vacuum sensor leak? A MAP sensor vacuum leak can upset ignition timing and engine stability and efficiency. A vacuum leak can also prevent an EGR valve from opening, cause engine overheating, and increase harmful emissions. This type of leak can also affect the Positive Crankcase Ventilation (PCV) system. Can a vacuum leak be at the engine? On thing I might mention is that not all vacuum leaks are at the engine. Some HVAC systems run on engine vacuum and can cause a leak under the dash in some cases. I've even seen vacuum operated...