That's what I've been thinking.
I don't know why I haven't loosened my gas cap to test this.

I've also bypassed my FPR VSV and hooked the vac line directly to the plenum. I "think" I have a small leak in the fuel system somewhere. After driving, then removing the gas cap, I get the whoosh of air going in, however, if it sits a few days, no whoosh of air.


85 4Runner - With NEW Marlin 4.7 Gears!! It's a whole new beast!