[Shotimes] Re: Why does the CE light go on if the gas cap isn't tight on OBD II cars?

[Paul Nimz]

That is a good indication you're fuel vapor recovery system is
malfunctioning.  It is the job of the FVR to vent the tank and keep fumes
from escaping into the atmosphere.

Paul Nimz
'97 TR SHO
'93 EG mtx SHO


----- Original Message -----
From: "Kevin & Cheryl Airth" <clubairth@cajunnet.com>
To: <shotimes@autox.team.net>; <v8sho@v8sho.com>
Sent: Saturday, February 01, 2003 11:29 AM
Subject: Re: [Shotimes] Re: Why does the CE light go on if the gas cap isn't
tight on OBD II cars?


> This also happens on the earlier OBD I cars. Unscrew the gas cap and start
> driving. You will get a check engine light.
> .
> .
>
>
>
> > On OBD2 vehicles there is a monitor function that tests the fuel system
> > evaporative emission integrity. If you leave the gas cap loose or refuel
> > the car with the engine running, it may turn the MIL on and set a code.
> >
> >            Tom W
> >            Red 93 ATX
> >            Black 92 MTX
> >            Both OBD1 (thank God)
>
> > >
> > > > When you went in for an emissions inspection they used
> > > > to remove your gas cap and test the cap to see if it
> > > > were working properly.  Since (at least here in GA)
> > > > cars with OBDII supposedly know if your car is working
> > > > right, all they have to do is plug into your cars OBDII
> > > > port and the car will tell the examiner if it will pass.
> > >
> > > In selected high-pollution areas here in Texas, they do both.  They
plug
> into the OBDII port and interrogate the computer, AND they do some sort of
> pressure test on the gas cap.