Recently my trucks fuel pressure has been running pretty high, right around 36 to 37psi at idle and I know from talking with sal that should be around 31psi at idle. Now I have no clue why it went that high but I'm wondering if my 02 sensors went bad if that would have that much of an effect on it. I can see my exhaust tips are blacker then black after a 25 mile round trip so I know its running pretty rich, and I'm running tr6's in the truck at a .034 gap. This really has my mind boggled and I'm thinking its got to be from bad 02 sensors, I'm almost positive one of them is bad cause I remeber with the autotap I wasn't getting a reading on one of them.

Have any of you guys experienced this before?

The front 02 sensors are the one's that would effect this too right? I'm almost positive my rear 02's are turned off with my chip since I have no emissions control stuff on my truck now and sal turned that all off.

I'm going to mess with it but what do you guys think?

 

TTT

 

I think that I'm at 32 lbs at idle. I highly doubt that an O2 sensor will change the line pressure, but I don't know for sure. The reason why I say that is because when my truck goes into open loop mode due to cold temperatures, my pressure still stays at 32 lbs at idle.

I don't know what triggers the fuel pressure, but if I had to take a guess I would say it's the throttle position sensor.

What is your WOT pressure?