VinnyAllenMX
New Member
My wife went on a road trip and got the restricted performance warning, said the electronics started acting up and doing weird displays. Checked the codes when she got back and got he P0087 low fuel rail pressure code. Tested the fuel pressure on the rail with a guage and it was reading 60-70 psi and pressure was holding pretty good after shutting off the engine. When the engine starts cold it takes some cranking to get started and will surge, but when it warms up will idle good. Tried installing a new pressure sensor LR044707, didn't work. Tried cleaning the injectors and MAP sensors to no avail. Bought another tester so I could give live data and discovered that the gauge pressure on the rail was reading higher than the absolute fuel rail pressure being sent to the OBD monitor by at least 10 psi and about 15 psi when engine was not running. So I tried installing another LR012280 fuel sensor with pigtail permanently attached. Still the OBD monitor is reading lower by 10-15 psi what is showing on the pressure gauge attached to the rail. I believe that the proper pressure is about 65 psi, which is what is showing on the gauge. Can anyone help me here? I'm at a loss for what to do next.
Below is some of the freeze frame data for the P0087 code on the last run:
Abslt TPS(%) 16.5
Eng Speed 1159
Baro Press 29.2
Calc Load 21.6%
MAF lb/m 1.24
MAP HG 8.0
IGN ADV 45 degrees
ST FTRM2 13.3%
LT FTRm1 -2.3%
LT FTRM2 -3.9%
ST SEC FT1 0%
ST SEC FT2 0%
LT SEC FT1 -0.8%
ABS Load 16.5%
Fuel SYS 1 CLSD
Fuel SYS 2 CLSD
REL TPS 4.7%
THROT CMD 24.3%
ABS TPS B 33.3%
ACC POS D 18.0%
ACC POS E 18.0%
EVAP PURGE 0.0%
CMD EQ RAT 0.994
VPWR 14.668
Below is some of the freeze frame data for the P0087 code on the last run:
Abslt TPS(%) 16.5
Eng Speed 1159
Baro Press 29.2
Calc Load 21.6%
MAF lb/m 1.24
MAP HG 8.0
IGN ADV 45 degrees
ST FTRM2 13.3%
LT FTRm1 -2.3%
LT FTRM2 -3.9%
ST SEC FT1 0%
ST SEC FT2 0%
LT SEC FT1 -0.8%
ABS Load 16.5%
Fuel SYS 1 CLSD
Fuel SYS 2 CLSD
REL TPS 4.7%
THROT CMD 24.3%
ABS TPS B 33.3%
ACC POS D 18.0%
ACC POS E 18.0%
EVAP PURGE 0.0%
CMD EQ RAT 0.994
VPWR 14.668