JoeFo,
     Interesting enough I think that it is not
pressure that is important for the working cap but
negative pressure.   It maybe that this smog test
requirement is doing you a favor because the engine
creates negative pressure in your gas tank by sucking
vapors from the charcoal canister that is connected to
the gas tank and that rather elaborate series of hoses
and plastic tanks.   In some models a bad cap can
cause poor engine performance and even  do damage to
an engine and the cat.   Seems reasonable that you
would want to replace a bad cap.   gary

Date:    Wed, 13 Nov 2002 22:13:27 EST
From:    Ben T <BenTbtstr8@AOL.COM>
Subject: Re: weird smog rule

In a message dated 11/13/02 7:06:24 PM Pacific
Standard Time,
fortinoj@SPEAKEASY.NET writes:

<< smog check now checks gas caps for pressure? total
weirdness if you
ask me
 it can fail the test if your cap has a micro crack??
anyway heads up
calie4nia people
 another rule in the world of cars! >>

JoeFo,

They've been doing this for a couple of years. Your
cap can be
releasing
gasoline vapors. Makes total sense to me. I brought an
extra cap to my
last
inspection just in case. I haven't failed yet.
However, I have seen
cars with
dirty rags for gas caps turned away.

BenT

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