I got a trouble code 54 which can be the fuel pump, the relay, oil pressure switch etc. anyway i was thinking of replacing the relay and was wondering where it might be located. thanks

 

The relay is on the driver side of the fire wall the third little black box in, closest to the wiper motor. It is square as opposed to the slightly round other two. I just bought one. The problem I had was the car breaking up due to loss of fuel pressure when the car reached temperature. Did you have the same issue??????????? I have been trying everything to remedy!!!

 

yea that was my problem because when i was out driving it felt like it was kind of chugging a little. As far as loosing fuel pressure, I would say try injecor cleaner to clean the lines and injectors, relay, then the filter, or the pump as a last resort if you haven't tried those already. How many miles do you have on it? If it has a lot and is still on the original pump it could be that. Most of them go around 130-160k mi range.

 

I have 700 or so miles on the car. I have replaced the pump twice inorder to correct the problem, no luck. I replaced the Relay, and just about every other thing. I'm going to check the voltage to the pump next. The pressure drops from 40lbs to 10lbs maybe there is a bad connection. It only does it when it is warmed up.