Posts Tagged: EVAP system problems
How the evaporative emissions system works
How to Diagnose an Evaporative Emissions System Like a Pro Quick Summary The evaporative emissions system is simple in concept but critical in function: It’s designed to capture fuel vapors, store them, and then burn them in the combustion chamber instead of allowing them to pollute the air. Modern systems are extremely sensitive, so even small leaks can trigger the check engine light. Most failures come down to leaks, stuck valves, or a saturated charcoal canister, and the only way to fix them properly is with a methodical diagnostic approach—not … Read More
Why Your Car Won’t Start After Filling With Gas
Why Refueling Can Trigger a Car Won’t Start Condition Quick Summary: If your car won’t start after a fill-up, you most likely have a problem with a stuck open purge valve and a flooded engine. The purge valve is supposed to be closed as you fill your tank, so the fuel vapors go into the evaporative emissions charcoal canister. However, if the valve is stuck open, the vapors instead go into your engine, flooding it and causing a no-start condition. In this guide, I’ll walk you through how the system … Read More