Relevant Modifications: Fuel system is completely stock, running 93 pump gas with meth injection. Car is FBO on stock twins. Pink floor mat retrofit.
Background: Got a CEL the other day while cruising around town, don't recall the code but the description was something similar to "low pressure fuel sensor, signal missing." Car did not limp and drove fine. Cleared the code, didn't come back - log LPFP pressure and see that its indicating 58-60 psi at idle(72psi is target) - good the sensor is talking... I take it for a drive, notice that the pressure stays around 50psi while driving, going WOT it stays around 50 but dips as low as 37psi a few times. I assume its just my fuel pump getting tired, I order a new oem pump/bucket/fuel sending unit, whatever the hell they call it.
Fast forward to last night. I install the new pump assembly, fire the car up. Runs great. Plug in the cobb, still indicating 58-60psi at idle - WTF. Take it for a drive, same behavior -save for the fact that i never see the fuel pressure drop below 50psi.
So i'm a little pissed that I wasted money on replacing my fuel pump, but now i am not sure i just want to start throwing parts at the thing. In my mind, the most logical issue is the FPR is failing to regulate things (pussy). But the fact that i did also have a logged code indicating the fuel pressure sensor had an issue makes me think it could be a sensor on its way out. FWIW, i had the low fuel pressure sensor replaced about 20k miles ago, same time they replaced my twins and HPFP under the recall.
So, what are your thoughts? Anyone have a similar issue?
Background: Got a CEL the other day while cruising around town, don't recall the code but the description was something similar to "low pressure fuel sensor, signal missing." Car did not limp and drove fine. Cleared the code, didn't come back - log LPFP pressure and see that its indicating 58-60 psi at idle(72psi is target) - good the sensor is talking... I take it for a drive, notice that the pressure stays around 50psi while driving, going WOT it stays around 50 but dips as low as 37psi a few times. I assume its just my fuel pump getting tired, I order a new oem pump/bucket/fuel sending unit, whatever the hell they call it.
Fast forward to last night. I install the new pump assembly, fire the car up. Runs great. Plug in the cobb, still indicating 58-60psi at idle - WTF. Take it for a drive, same behavior -save for the fact that i never see the fuel pressure drop below 50psi.
So i'm a little pissed that I wasted money on replacing my fuel pump, but now i am not sure i just want to start throwing parts at the thing. In my mind, the most logical issue is the FPR is failing to regulate things (pussy). But the fact that i did also have a logged code indicating the fuel pressure sensor had an issue makes me think it could be a sensor on its way out. FWIW, i had the low fuel pressure sensor replaced about 20k miles ago, same time they replaced my twins and HPFP under the recall.
So, what are your thoughts? Anyone have a similar issue?