What is the importance of your fuel cap for the Pennsylvania State Emissions Inspection?
The gas cap is a part of Evaporative Emission system.
The components of the Evaporative system include a charcoal canister, purge valve, vent valve and of course your gas cap.
The job of the Evaporative system is to keep hydrocarbons or unburned fuel vapors from being released into the atmosphere.
When you put gas in your car and you put the gas cap back on it seals the fuel neck and keeps fuel vapors in the gas tank.
Fuel vapors are stored the charcoal canister where they are held until acceleration or steady highway driving.
Then, the fuel vapors will be released by the purge valve and intake manifold vacuum will pull the fuel vapors from the charcoal canister into the intake manifold where they will be introduced into the cylinders to be burned.
If the gas cap is leaking or not installed properly, it will cause a leak in the evaporative system.
The cars on board computer will detect this and it will illuminate the check engine light. This will cause your vehicle to fail PA state emissions inspection.
Name: Colby Gibson
School District: Eastern York High school
Area of Interest: Automotive, hands on, Civil War reenactor.
Plans After High School: Get a full-time job as an automotive technician and look into additional education in the automotive industry.