2002 mercury sable w/ duratec, I'm getting excessive fuel tank pressure. I bought the $300+ line set for the tank and made sure the evap canister was not clogged but it is still forcing fuel out of the top seals that are supposed to withstand 120psi. Fuel pressure sensor failure usually affects drivability but I don't have any other issues. Could a faulty sensor be causing this?
Could be your vent valve is clogged with carbon. vent valve in the top of the fuel tank. hard to get to.
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