Quote:
Originally Posted by spinjockey
You probably dodged a bullet but have to watch it. The carbon canister gets plugged with repeated overfilling and contamination with age. This makes the carbon more like clay which effects the vacuum in the evap system triggering a CEL in some extreme cases and a howl in others.
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I'm wondering if this thread is similar to my issue. Car starts, idles, and drives with no issues. At speeds above 50mph, I get a loud howling noise from the fuel filler area. I replaced the gas cap and no difference. I am repeatedly getting the P0445 (large evap leak) code whenever I give above ~50% throttle when the fuel tank drops below 3/4 of a tank.
Not sure if the plan of attack here should be replacing the purge control valve and charcoal canister at the same time. Or do the charcoal canister first.