bobinyelm
New Member
- Joined
- Apr 22, 2020
- Messages
- 4
- Reaction score
- 0
- Points
- 1
- Location
- Olympia, WA
- Vehicle Year
- 2003
- Make / Model
- Ford Ranger FX-
- Transmission
- Automatic
2003 Ranger 4.0 liter 64,000mi since new
I posted a question a while back but didn't have all the PIN readins (Live Data) to assist in diagnosing for a LEAN BANK 1 & 2 Long Term Fuel Trim codes (P0171 and P0174). Bank 1 and 2 LTFT are BOTH 25
I now have every reading imaginable that the scanner could provide, so if any of you could help me diagnose the problem I would most appreciate it. I photographed the screen and can list whatever numbers you might think helpful.
Let me start by saying that the truck runs well, with no discernable poor running conditions under any circumstances. I sprayed EVERYTHING with flammable brake cleaner to try to find a possible air leak. With only 64k on the truck, all lines (plastic/rubber) look GREAT, and no leaks could be found.
Erasing the codes and running the truck takes maybe 500mi for the codes to return (but the LTFT readings are immediately evident). The STFT is also 25% now (the graphed readings bounce between 22-26).
Readings: (All taken at idle, 55 def F at 300ft Above Sea Level)
LTFT #1 25%
LTFT #2 25%
Manifold Pressure 0 psi (shouldn't it read atmospheric, or a vacuum like 20 or so in at idle?)
Mass Airlfow Status: "No Error"
Mass Air Flow 5.1 gr/sec or 0.66 lb/min
Mass Airflow Volts: 0.91v
Baro Pressure: 13.38psi
Engine Misfire Detected: NO
EGR Status: "No Error"
EGR Evaluated: YES
EGR Sys Eval Test Ready: "Not Ready"
EGR Vac Regulator Fault: "No Error" (Is this the DPFE?)
STFT #1 29% +/- 4% variable
STFT #2 28% +/- 3% variable
I DO now have a DTC P1000 OBD Readiness Test Incomplete which I suspect is just because I reset the previous codes, and the Readiness Monitors have not completed their drive cycles.
Questions/Comments/Ideas uch Appreciated?
Thanks,
Bob
I posted a question a while back but didn't have all the PIN readins (Live Data) to assist in diagnosing for a LEAN BANK 1 & 2 Long Term Fuel Trim codes (P0171 and P0174). Bank 1 and 2 LTFT are BOTH 25
I now have every reading imaginable that the scanner could provide, so if any of you could help me diagnose the problem I would most appreciate it. I photographed the screen and can list whatever numbers you might think helpful.
Let me start by saying that the truck runs well, with no discernable poor running conditions under any circumstances. I sprayed EVERYTHING with flammable brake cleaner to try to find a possible air leak. With only 64k on the truck, all lines (plastic/rubber) look GREAT, and no leaks could be found.
Erasing the codes and running the truck takes maybe 500mi for the codes to return (but the LTFT readings are immediately evident). The STFT is also 25% now (the graphed readings bounce between 22-26).
Readings: (All taken at idle, 55 def F at 300ft Above Sea Level)
LTFT #1 25%
LTFT #2 25%
Manifold Pressure 0 psi (shouldn't it read atmospheric, or a vacuum like 20 or so in at idle?)
Mass Airlfow Status: "No Error"
Mass Air Flow 5.1 gr/sec or 0.66 lb/min
Mass Airflow Volts: 0.91v
Baro Pressure: 13.38psi
Engine Misfire Detected: NO
EGR Status: "No Error"
EGR Evaluated: YES
EGR Sys Eval Test Ready: "Not Ready"
EGR Vac Regulator Fault: "No Error" (Is this the DPFE?)
STFT #1 29% +/- 4% variable
STFT #2 28% +/- 3% variable
I DO now have a DTC P1000 OBD Readiness Test Incomplete which I suspect is just because I reset the previous codes, and the Readiness Monitors have not completed their drive cycles.
Questions/Comments/Ideas uch Appreciated?
Thanks,
Bob