Long and short fuel trim -100%


wildstang

Forum Member

Joined
Feb 17, 2026
Messages
14
Points
101
City
ORANGE
State - Country
VT - USA
Vehicle Year
1995
Vehicle
Ford Ranger
Drive
4WD
Engine
4.0 V6
Transmission
Manual
Total Lift
stock
Total Drop
stock
Tire Size
235/75 R15
Having some issues with 97 4.0 5 speed. Had code for lean bank 1 and 2. I found the hose from throttle body to the purge valve was disconnected. But I think it may have been for a while. My little scanner on live data showing-100% for short and long fuel trim on both 1 and 2. I sprayed some carb cleaner around but didn’t hear any rpm increase. The minus means it’s cutting back on fuel correct? Guess I’m not sure why? The truck does have a 99 engine in it so the smog stuff isn’t hooked up. Been this way for a year.
Thanks for any help
 

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