Cadillac Catera and Cimarron Forum Discussion, 98 Catera No Fuel Pressure in Past Cadillac Vehicle Discussion; I have a '98 Catera that has zero fuel suppy / pressure. I have replaced the fuel pressure relay and ...
I have a '98 Catera that has zero fuel suppy / pressure. I have replaced the fuel pressure relay and it has power coming out of relay with switch on, but there is no power to the 20A fuse under steering wheel. I even tried replacing the computer, no change. Car was sitting over a year so I drained the old gas out and put fresh fuel in. Now gas guage doesn't even register the 4 gallons of fresh fuel I put in it. This thing is driving me crazy!! Any ideas out there before I junk it!!!
If you changed the gas in the tank, you took out the tank, right (or is there a drain plug in there?)? Since the gas gauge doesn't work and there isn't any power to the fuel pump, it sounds like a bad connection for the plugs at the tank, or possibly a bad ground.
Where did you measure the voltage out of the fuel pump relay? If I were to check if the fuel pump relay was energized, I'd check at fuse 18, otherwise you'd have to check at the back of the relay socket. If you were getting voltage at the back of the socket but not at the fuse, you'd probably have a broken wire.
Pull the relay and measure at pin 2 of the socket. You should have voltage there. Then try jumpering pins 2 and 8 at the socket and see if you get voltage at the fuse (or see if the fuel pump is running.) fuel1a.jpg