fuel pressure too high.
I have noticed the last couple of times I had my car running that my fuel pressure is high. It is running at about 95 psi. It has a return line back to the tank and I have had this set up for 2 to 3 years now. I am wondering if the regulator is bad? has anyone experienced this before? There seems to be a regulator part number out there that is questionable. I am running the 400hp system with the inline pump. Any help is appreciated.
Is your pump connected directly to the Orange wire. If so, turn down the pump PWM. This will reduce idle and part throttle fuel pressure and extend the life of your pump. The unit will increase the pump output when capacity is needed. I.e. full throttle.
Couple of questions: One has it always done this or just started. Two, what kind of fuel system are you running (need details.)
I would disconnect the return line and run it into a gas can to see if it is clogged.
Personally I always run a bigger return line than feed.
Yeah, I had my mean street 800 quit returning fuel all of a sudden one day. I noticed the car running funny and looked at the fuel pressure at the fuel inlet, and it was 90 psi, precisely what my pump is rated at. I went ahead and put in an external regulator and fed that return back to the tank and plugged the fitech return. Now it reads 59 psi all the time, problem solved. My fuel pump has to run continuously with the engine on, because it can't accept PWM according to the manufacturer.
Well after talking with Fitech and getting the part number for the fuel pressure regulator. I ordered one from amazon for $17.00. I put it on and all is good with the world.