vietalogy

Lately it's been very hard to remove my gas cap to fill up the tank anyone know why this happens?

sktn77a

iTrader: (2)

Is it just tight or is there a vacuum holding it down?

lexus114

Never heard of this??

vietalogy

I'm guessing both. Right now I just close the cap just before I hear the first click.

lexus114

You should close it until it clicks, that much I do know.

vietalogy

Since its been warmer it's easier to take the cap off. I'm guessing the winter and cold made it hard to take off.

sktn77a

iTrader: (2)

Do you hear air rushing into the filler when you unscrew the cap (that would be a vacuum - possibly a clogged charcoal filter). Otherwise, you might just need to pump some iron!

CharBaby

Our 2001 RX has the hardest to remove gas cap. My wife can't do it at all!
Her sister has the exact same year RX and it's fine! I even bought a new cap
and it's just as difficult to remove as the OE cap

salimshah

How about swapping the gas-caps from your wife's to her sister's. If the problem does not travel then look at the filler-neck.

Also try removing the cap after a while [one or two days sitting in the garage]. The system is not totally air-tight. As fuel is used the tank does get air in. The monitor for leaks (slow evap leak) is calibrated for this.

Sali

CharBaby

We did that years ago. It's gotta be our filler neck although there are no problems when putting on the cap or after the initial seal breaks(what seems like a vacuum seal) It's hard to unscrew!