Manuals through 2025 now available!
Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.
LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
lemon-manuals.la or
lemon-manuals.org.ua
(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)
Or, hide this message:
temporarily or
permanently
Short Term FT Avg
Display shows percentage from
-100% to 99%. The center position for the short term fuel trim is
0%. A percentage greater than
0% indicates that time is being added to the MCV pulse width, increasing the amount of fuel to the engine to compensate for a lean condition sensed by the average of both the
oxygen sensors. A percentage less than
0% indicates time is being subtracted from the MCV pulse width reducing the amount of fuel to the engine to compensate for a rich condition sensed by the oxygen sensor. A value of
0% indicates no compensation is required to operate the engine at the desired 16.8 to 1 air/fuel ratio.