IPR vs ICP ???

[HAM_RADIO_MAN]

So now that I've have the time to play with my Scan GuageII and do some data logging for future trouble shooting, I have a question? I have recorded the values for IPR vs ICP now and every thing seam fine. In the future if i notice that I need more IPR percentage to get the same ICP does that mean I have a high Pressure oil leak deveploing? What else can I infer from the relationship between the two? So that I have a standard model I have taken these mesurements at idle and high idle with a cold engine and with the engine and oil up to 190 deg. Sugestions for other data to log now that might be helpful later down the road when I need to do some trouble shooting?

[amdriven2liv]

here some operating values.

Not that we have this many Xgauges, yet!

Acronym Key On, Low Idle, High Idle, Operating Range Measurement, Units Description

ACCS OFF OFF OFF OFF/ON OFF/ON AC Cycle Switch

ACP OPEN OPEN OPEN OPEN/ CLOSED OPEN/ CLOSED AC Pressure Switch

APP 0 0 13 0 - 17.75 PERCENT Accelerator Pedal Position

APP1 4.0 4.0 3.4 0.7 - 4.2 VOLT Accelerator Pedal Track 1
APP2 1.4 1.4 1.9 1.4 - 4.1 VOLT Accelerator Pedal Track 2
APP3 0.9 0.9 1.4 0.8 - 3.5 VOLT Accelerator Pedal Track 3
APP_MODE CT CT PT CT, PT, WOT CT, PT, WOT Accelerator Pedal Position
AST 00:00 00:07 01:00 - min : sec Time Since Start

B+ 12.6 13.3 14.0 10.5 - 15.5 VOLT Battery Voltage

BARO 96.5 (14) 96.5 (14) 96.5 (14) 50 - 120 (7.3 - 17.4) kPa (PSI) Barometric Pressure

BOO OFF OFF OFF ON/OFF ON/OFF Brake Pedal
BPA OFF OFF OFF ON/OFF ON/OFF Brake Pressure Applied

CLRDIST 926.1 926.1 926.1 - Miles Distance Since DTCs Cleared
CLRWRMUP 2 2 2 - Numeric Value Number of Warmups Since DTCs Cleared

CMPFM NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT CMP Status

CPP/PNP NEUTRAL NEUTRAL NEUTRAL NEUTRAL DRIVE/ NEUTRAL Clutch Pedal Position

DECHOKE No No No - Yes/No Dechoke Mode

DRIVECNT 6 7 7 0 - 65535 NUMBER Valid Drive Counter

DTCCNT 0 0 0 0 - 255 NUMBER DTC Count

ECT 88 (190) 88 (190) 88 (190) -40 - 121 (-40 - 250) TEMPERA- TURE °C (°F) Coolant Temperature

ECT_FM NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT ECT Fault

EGR EVAL NO NO NO YES NO/YES EGR Evaluated
EGR DC# 0 0 - 15 32 0 - 44 PERCENT EGR Duty Cycle
EGR_F NO FAULT NO FAULT NO FAULT 0 - 44 FAULT/NO FAULT EGR Status
EGRVP 0.8 0.8 - 1.0 1.3 0.6 - 3.5 VOLT EGR Valve Position
EGRVPDES 0 0 9.72 0 - 14 PERCENT EGR Desired

EOT 88 (190) 88 (190) 88 (190) -40 - 150 (-40 - 302) TEMPERA- TURE °C (°F) Oil Temperature
EOTFM NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT EOT Status

EP 103 (15) 110 (16) 110 (16) 55 - 607 (8 - 88) kPa (PSI) Exhaust Pressure
EP_V 0.8 1.2 1.3 0.4 - 4.7 VOLT Exhaust Pressure
EP DSD 3.26 2.43 2.13 PSI Exhaust Pressure Desired

FANSS 0 533 488 0 - 4000 RPM Fan Speed
FANSSM LOW LOW LOW LOW LOW/HIGH Cooling Fan Driver
FAN VAR # 0 0 0 0 - 100 Percent Fan Speed Monitor
FAN VAR_F NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT Fan Speed Monitor

FICMSYNC NO YES YES YES YES/NO Synchronization from FICM
FICM_LPWR 12.0 13.5 13.5 10.5 - 15.5 VOLTS FICM Logic Power FICM logic power from the FICM relay.
FICM_MPWR 47 47.5 47.5 40 - 52 VOLTS FICM Main Power FICM injector power supply from the FICM relay.
FICM_VPWR 12.0 14.0 14.0 10.5 - 15.5 VOLTS FICM Vehicle Power FICM vehicle power from the ignition switch.

FLI 36.1 36.1 34.1 0 - 100 PERCENT Fuel Level Indicator
FP# ON/OFF ON ON ON ON/OFF Fuel Pump
FPM ON/OFF ON ON ON ON/OFF Fuel Pump Monitor
FUELPW 0 990 680 0 - 50000 (μ seconds) Fuel Pulse Width

GENB_F NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT Generator 2 Output Fault
GENFIL OFF OFF OFF OFF OFF/ON Generator Fault Indicator
GEN_F NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT Generator 1 Output Fault

GPCTM 0 0 0 0 - 180 TIME (seconds) Glow Plug Coil On Time
GPL ON/OFF OFF OFF ON/OFF ON/OFF Glow Plug Indicator
GPLTM 0 0 0 1 - 10 TIME (seconds) Glow Plug Indicator On Time

IAT 98.6 98.6 96.8 -40 - 250 TEMPERA- TURE (°F) Intake Air Temp (MAF Assembly)
IAT2 113 113 113 -40 - 250 TEMPERA- TURE °F Intake Air Temp (Manifold Air)
IATFM NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT IAT Status

ICP 0.2 1.0 1.8 0.15 - 4.7 VOLT Injection Control Pressure
ICP_DES 0 625.5 1400 - 1450 0 - 4045 PRESSURE (PSI) ICP Desired

INJ1_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ2_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ3_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ4_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ5_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ6_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ7_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ8_OFF # NORMAL NORMAL NORMAL NORMAL DISABLE/ NORMAL Injector Disabled
INJ_TIM 0 -8.71 +3.5 -50 - 50 ANGLE (Degrees) Injector Timing (TDC)

IPR # 14.84 24 40.60 0 - 50 PERCENT Injection Pressure Regulator

LOAD 0 12.5 14 0 - 100 PERCENT Calculated Load Value

MAF 0 1.44 2.65 0.5 - 4.75 VOLT Mass Air Flow
MAF_FM NO FAULT NO FAULT NO FAULT NO FAULT NO FAULT/ YES FAULT Mass Air Flow Status

MAP 96 (14) 96 (14) 103 (15) 41 - 324 (6 - 47) kPa (PSI) Manifold Absolute Pressure
MAP_V 1.30 1.33 1.40 0.5 - 4.5 VOLT Manifold Absolute Pressure

MFDES 0 7.5 10.7 0 - 100 MASS mg/stroke Mass Fuel Desired

MGP 0 0.25 0.8 -10 - 30 PRESSURE (psi) Manifold Gauge Pressure

MIL OFF OFF OFF OFF ON/OFF Malfunction Indicator

MIL_DIS 926.1 926.1 926.1 - Miles Distance Since MIL Activated

MISF_EVAL NO NO YES YES NO/YES Misfire Monitor
MP_LRN YES YES YES YES NO/YES Learned Misfire Correction
NM 0 0 0 0 - 65535 NUMBER Number of Misfires

PATSENABL ENABLED ENABLED ENABLED ENABLED ENABLED/ DISABLED Passive Anti-Theft

PBA OFF OFF OFF OFF OFF/ON Park Brake Applied
PNP Neutral Neutral Neutral Park/Neutral Park/Neutral Park/Neutral Position Switch

RPM 0 628 2500 0 - 4096 RPM Revolutions Per Minute
RPMSD 625 625 625 625 RPM Desired Idle RPM

SCCS NONE NONE NONE OFF/ON/ RESUME/ CANCEL/ NONE/SET/ COAST/ NOT

AVAILABLE OFF/ON/ RESUME/ CANCEL/ NONE/SET/ COAST/ NOT AVAILABLE Speed Control Switches

STRT_RLY DISABLED DISABLED DISABLED DISABLED DISABLED/ ENABLED Starter Relay

SYNC NO YES YES YES NO/YES CMP and CKP Synchronized

TORQUE 0 9 - 20 50 400 Nm Net Engine Torque

TRIP NO NO NO YES N0/YES OBD Trip Completed
TRIP CNT 0 0 0 0 0 - 255 Trip Count

VFDES 0 9 14 0 - 250 VOLUME mm^3 Volume Fuel Desired

VGTDC # 0 73 43 0 - 100 PERCENT Turbo Duty Cycle
VGT_F NO NO NO NO NO/YES Turbo Fault

VREF 4.9 4.9 4.9 4.5 - 5.5 VOLTS Reference Voltage

VSS 0 0 0 0 - 120 SPEED (MPH) Vehicle Speed

WAC OFF OFF OFF OFF ON/OFF WOT A/C Cutoff

WFS NO NO NO NO NO/YES Water in Fuel

[HAM_RADIO_MAN]

Does anyone have any ideas on this?

[a2elvis]

I think normally idle ICP about 700ICP and IPR should be about 30%. Normally wide open I see 70% IPR and about 4000 psi ICP. If IPR has to keep creeping up to keep ICP what it needs that might be a sign if high pressure oil leak. Dummy plugs maybe standpipes

[HAM_RADIO_MAN]

This is what I was wondering about. I was trying to provoke some discussion on this topic. It would be good if you could record some data point about your truck so that if there was a problem creeping up it would be easier to trouble shoot. We now have access to a wealth of data it would be great if there was some more discussion on how to put that to work. IF I know what "normal" is then I can spot a problem sooner when it might cost less in dollars and frustration to fix.

[Goose350]

Lets talk ICP and DC%