Rear fuel pressure dipping to 820psi at WOT

[Slow project]

Dealing with fuel issues, miss fires at idle (no codes) runs lean right before pull (WOT). Everything is new on the fuel system besides fuel filter (might replace soon). Been dealing with this issue for a couple months, went to different forums and still can't get any answers or a fix.

 

[yaycandy]

Dealing with fuel issues, miss fires at idle (no codes) runs lean right before pull (WOT). Everything is new on the fuel system besides fuel filter (might replace soon). Been dealing with this issue for a couple months, went to different forums and still can't get any answers or a fix.
View attachment 85379

Passenger side behind back seat replace fuel module. Fixed my issues a few years back

Id still replace it to see if its changes. If not just clean the part and return it as wrong part or not needed. Thats how I diagnose electrical components.

 

[luigisho]

What was done so far? I remember another thread about this

 

[Slow project]

Passenger side behind back seat replace fuel module. Fixed my issues a few years back

Id still replace it to see if its changes. If not just clean the part and return it as wrong part or not needed. Thats how I diagnose electrical components.

View attachment 85380

Passenger side behind back seat replace fuel module. Fixed my issues a few years back

Id still replace it to see if its changes. If not just clean the part and return it as wrong part or not needed. Thats how I diagnose electrical components.

View attachment 85380

Yea that’s the first thing I changed, then went on to just about everything to do with fuel

What was done so far? I remember another thread about this

 

[Slow project]

What was done so far? I remember another thread about this

in tank fuel pump, high-pressure fuel pump, driver module, injectors, coils, spark plugs, just about everything to do with the fuel system. My tuner at gh said he wants me to get a data log using a hp tuner to see fuel maps or something. He also said that sct’s “rear fuel pressure” is the fuel rail pressure. So I guess I’m dropping fuel rail pressure