Where is the Fuel Filter on a 1990 Cadillac Seville
in the gas tank
The fuel filter is located in or under the driver side frame rail.
Most fuel filters for injected GM vehicles are on the drivers side, under the vehicle.
Electronic Fuel Injection ( EFI )
There are seals top and bottom of injector. Either the seal is defective or loose
Under vehicle, driver side, below seating area, near fuel tank, mounted on frame rail in fuel line.
87 Unleaded. But use 89 once in a while to keep the engine clean.
on the frame directly below the rear passenger door. its bolted to the frame.
If the fuel gauge is not operating on your 1994 Cadillac Eldorado touring coupe, you might have an issue with the sensor or with the fuse for the fuel gauge. You will need to check your electrical system first.
there is a button near the spedometer display that switches us and metric
FFS on a 1990 Cougar stands for feedback fuel system.