2003 5.4l troubles.
Thread Starter
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Senior User
Joined: Feb 2017
Posts: 146
Likes: 1
From: Huntsville
2003 5.4l troubles.
Truck has been pulling P0172 and P0175 for a while. Unable to find the source. New MAF. No vacuum leaks found. (Not sure what else to check.)
Need to hunt down the cause of the Rich codes. I’m annoyed!
OBDII readings on a closed system.
Idle
LTFT B1 8.59%
LTFT B2 -1.56
2,000 RPM
LTFT B1 -1.56
LTFT B2 -6.25
Need to hunt down the cause of the Rich codes. I’m annoyed!
OBDII readings on a closed system.
Idle
LTFT B1 8.59%
LTFT B2 -1.56
2,000 RPM
LTFT B1 -1.56
LTFT B2 -6.25
Laughing Gas
Joined: Feb 2003
Posts: 877
Likes: 27
From: South Florida
Since the MAF is new, check the PCV is clean. You can pull it out of the valve cover grommet and spray some carb cleaner through it to clean it. Check the fuel dampener on the fuel rail is not passing raw fuel to the vacuum tube ( ruptured diaphragm ...). EGR valve not stuck open.
Does your motor oil smell like fuel ?
-Mike
Does your motor oil smell like fuel ?
-Mike
Thread Starter
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Senior User
Joined: Feb 2017
Posts: 146
Likes: 1
From: Huntsville
PCV is only a few months old, as are all the hoses attached to it. I will check the fuel regulator!
Ran my OBDII on it for a quick second. Levels don't seem absolutely crazy, but are different.
Idle
LTFT B1 8.59%
LTFT B2 -1.56
2,000 RPM
LTFT B1 -1.56
LTFT B2 -6.25
Ran my OBDII on it for a quick second. Levels don't seem absolutely crazy, but are different.
Idle
LTFT B1 8.59%
LTFT B2 -1.56
2,000 RPM
LTFT B1 -1.56
LTFT B2 -6.25
Thread Starter
|
Senior User
Joined: Feb 2017
Posts: 146
Likes: 1
From: Huntsville
Since the MAF is new, check the PCV is clean. You can pull it out of the valve cover grommet and spray some carb cleaner through it to clean it. Check the fuel dampener on the fuel rail is not passing raw fuel to the vacuum tube ( ruptured diaphragm ...). EGR valve not stuck open.
Does your motor oil smell like fuel ?
-Mike
Does your motor oil smell like fuel ?
-Mike
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