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04 CS 2 issues I need some help with PLEASE!

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a couple of Q's for all you smart guys...

I have an 04CS sitting @ 95k miles. The regular maintenance has been done, coolant pipes, plugs, coils, belts, etc... and overall the car is solid, However, 2 issues have recently cropped up:

1. about 4 hours after the CS went naked. i started smelling a gasoline smell from the drivers side rear wheel well. upon inspection you can see where gasoline has seeped, albeit very slowly, from the hole in the gas tank cover and my gas mileage has dropped dramatically. I THINK its the connections or flange on that side of the gas tank and it looks like the access panel under the back seat is the way to go at it but not totally sure that's where I should begin looking. ideas? is this common? expensive? (attached a pic)

2. I now have a CEL for P0491-Secondary Air Injection System and the F4 fuse was blown. Just to be sure it wasn't an isolated event I replaced the fuse and it promptly blew. I'm not really sure where to begin looking for the problem and I'm a pretty good ways from a shop. Is this a serious problem ? can the car be driven until it's repaired? expensive?

no other codes or problems and the only performance diff. I've noticed is upon start it a little sluggish at low rpm's


thanks for any help you can give. you guys are the best!

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1- Remove the inspect cover to see what's going on. There are several quick disconnect connectors on the fuel filter module and chances are it's on the pressure line.

2- I think the fuse is for the electric air pump which can seize or become damaged from moisture. They are located above each cylinder bank and black in colour, I would unplug them, replace the fuse and if it doesn't blow connect each one in turn to see which one faults.

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