Hey,
I have a 05 monte carlo ls with the 3400 engine. recently i've noticed a fuel smell most of the time when i'm getting off the highway and am on a decline. i didn't think much of it until a cople of days ago. i tried to see or smell where it was coming from and couldn't. Has anyone had this same problem of have any idea what it might be. (nocheck engine light or anything.)

 

did you screw down a subwoofer box or anything in your trunk? the gas tank is extremely close the the sheet metal

 

is it of rich exhaust or raw fuel?

i would check your fuel rail connectors to make sure the oring seals havent leaked... this is a common issue on the l67's not so much on your motor though.

next i would check the evap system... it purges fuel tank vapor to the intake to be burned... one of these lines could have cracked.. they start at a charchol canister at the rear of the car and move forward. hope this helps

 

check the fuel rail and see if you are getting any smell or if you can see anything. )

 

thanks i'll check that in teh morning.
anyone knw hoard that that would be to fix or how much it would cost?

 

I'd run it and look for a leak. Like, around the Fuel Filter where it plugs into that clip-in fitting with the O-ring. You are supposed to replace the O-ring when you do the Filter; but I know that a lot of times that O-ring is just left in there to leak!

 

I still haven't smelled it ina couple of days. i'm going wait for the smell.. then I'll immediately pull over and find out where its coming from. but right now an't pinpoint it . i'll check back later.