Mine did this too when I bought it used at the dealer.
I took it back for th emto fix, and 8 mos later, it broke again.
I guess there is a part on the bottom of the regulator that can break or come loose...
Heres the TSB:
Get it while you can....I'll be taking it off my site soon....
Its TSB BO-0013....you can go to any Toy dealer, and theyshould be able to print it out for you...
http://www.frontiernet.net/~toyfvr/TacomaTSB2.pdf

I took it back for th emto fix, and 8 mos later, it broke again.
I guess there is a part on the bottom of the regulator that can break or come loose...
Heres the TSB:
Get it while you can....I'll be taking it off my site soon....
Its TSB BO-0013....you can go to any Toy dealer, and theyshould be able to print it out for you...
http://www.frontiernet.net/~toyfvr/TacomaTSB2.pdf