9-3 gas cap & engine warning light

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ctsaaber - 10 Jun 2006 14:15 GMT

I'm driving a 2003 Saab 9-3 where the engine warning light remains ON at
all times. Four vists between two local Saab dealers has resulted in them
replacing the gas cap twice. A diagnotic check (they plug the computer
into a panel under the steering wheel) each time has indicated a poor
vapor lock in the fuel system - caused by the gas cap. They cannot solve
the problem and insist I am not turning the cap enough times after
refueling. Each visit they have not been ab;e to get the warnign to turn
off either. SO they are as helpless as me. :) Has anyone else had this
issue? What was your solution/discovery? Thanks for your replies. Car
drives fine, by the way, even though the warning light remains ON.

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GetBent - 10 Jun 2006 14:49 GMT

[posted and mailed]

> I'm driving a 2003 Saab 9-3 where the engine warning light remains ON
> at all times. Four vists between two local Saab dealers has resulted
[quoted text clipped - 7 lines]
> Thanks for your replies. Car drives fine, by the way, even though the
> warning light remains ON.

I certainly don't mean to draw a comparison between the two vehicles, but I
had the same problem with my Chevy Venture. Replaced the gas cap twice and
still had the check engine light indicating poor vapor lock. Didn't really
notice any impact on performance. Finally they replaced the fuel filter and
did a throttle body service and the problem went away.

http://www.rprusa.com/throttle.htm

G.

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Walt Kienzle - 10 Jun 2006 17:36 GMT

> I'm driving a 2003 Saab 9-3 where the engine warning light remains ON at
> all times. Four vists between two local Saab dealers has resulted in them
[quoted text clipped - 6 lines]
> issue? What was your solution/discovery? Thanks for your replies. Car
> drives fine, by the way, even though the warning light remains ON.

My car is too old to have the fuel cap connected to the Check Engine light,
but as I was working on something else one day, I noticed that a hose to the
fuel vapor recovery canister was disconnected. The canister on my 9000 is
hidden in the fender well, so it isn't something that is normally examined.
All non-antique cars have this canister and if the connections are broken
either at the canister or anywhere along the line from the fuel tank, you
will no longer have a sealed fuel system. This will allow pollution causing
fuel vapors to escape into the atmosphere. FYI, all US cars from model year
1996 on monitor this as part of the OBD II diagnostic system.

Walt Kienzle
1991 9000T

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