Winter and "Tighen Fuel Cap" are back - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Winter and "Tighen Fuel Cap" are back
Posted by 93Gator [Email] (more from 93Gator) on Tue, 18 Nov 2014 17:57:56
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I obviously have something opening up that's not allowing my fuel system to operate under vacuum and hoping others here might be able to help figure out where to look. About a mile from home, I almost always hit a red light heading to work in the morning and I sometimes get the "Tighen Fuel Cap" message during the winter months. It never appears when I leave work, where I park in an outdoor lot, or am leaving from parking lot running errands. I don't get a CEL so it's intermittent enough not to trigger the CEL. The only thing I can think of is when I'm home my 9-3 sits in a detached garage where it will be a bit warmer than the ambient temperatures during the winter. The drop in temperature once I leave the garage causes something to open up.
Any ideas?
1999 9-3
223k miles
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