2003 doesn't like to take in gas at the gas pump it takes about 5 cents at a tme
EVAP problem. Any gas that goes in to tank the air and fumes must be displaced out. It goes in to the charcoal canister, and any vent valve that is stuck or clogged will cause that. Click this image
This, I forgot to post it, and ask away about anything you don't understand
The air and fumes pass through activated charcoal. Most of the raw hydrocarbons are absorbed by the charcoal and the air vents out. Then when you start your car, the intake vacuum purges the hydrocarbons out back in to intake to be burned instead of being released in to the air
Here it is they deleted my own drawing. I own it. Not copyrighted
Looking for a Used GS 300 in your area?
CarGurus has 1,003 nationwide GS 300 listings starting at $3,200.
Search Lexus GS 300 Questions
Lexus GS 300 Experts