Gas Cap Quick Question

BigBoss

New member
Ok so I have a quick question. I'm getting emmision leak CEL codes (says very small leak) and I'm pretty sure the cause is my gas cap. When I unscrew the cap just 1/10th of a turn, I can immediately feel the seal break. Also there is no hissing sound like there used to be. I've tried tightening it past 5 clicks and all that but still nothing. I ordered a new one but I'm still curious. How far of a turn on your 4runner do you have to turn your gascap to break the seal and release the pressure?
 
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I turn it pretty far to ensure a good seal. I was getting the check engine lights too when I first got it and it was due to a bad seal in the gas cap. I just went online and bought one for around $12 and had it shipped to me.
I put it on and reset the battery, haven't had an issue since.
 
I had the same problem. Just make sure you get one from the Dealership. The aftermarket ones tend to throw the same codes. Dealer one is only $22.
 
Tighten 3 clicks.

It should take some effort to break the seal. Mine pops after about 30* of rotation counterclockwise.
 
There is no effort what so ever to unscrew the cap. I can literally undo it with one finger so I'm gonna see how the new one works out.
 

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