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Gauge 1 or 4 mode can be accessed by pressing the gauge button once.
Gauge 1 mode
Gauge 1 mode showing error codes
MP displays engine vacuum in inches mercury absolute. The MP reading will change to ERR if the
map sensor loses its connection on the ground or power wires. If you see ERR check the connector at
the sensor and also check the wires for breakage. The sensor may have failed also. ET and AT are
engine and air temp readings which will also read ERR if the circuit is broken. For MAP and temp
sensors, ERR will stay displayed even if the fault was momentary. You can attempt to clear ERR by
pressing the +10 button when in Gauge1 or 4 mode. If the ERR clears, then the problem was
intermittent, and if the ERR stays displayed then there is a problem such as a broken wire or
damaged sensor. Never attempt to fly the aircraft with ERR codes displayed on the ground!
Gauge 2 mode
Gauge 2 mode can be accessed by pressing the right button (>) once when in gauge 1 mode.
Gauge 2 mode
Knob indicates the mixture knob position, +/- 50%. 0% (no correction) is with the witness mark straight
up at the 12 o’clock position.
AP indicates the acceleration pump feature, which adds extra fuel as the throttle opens. AP should
read zero when the throttle is steady. The AP number should increase above zero as the throttle is
opened. If AP reads a value higher than zero when the throttle is stable, the throttle position sensor
may be faulty.
Duty Cycle (DUTY) refers to the amount of time that the injector remains open in relation to how much
time is available at that rpm before the next injection cycle begins. If the engine is missing or running
rough check DUTY for unstable readings. This may indicate a bad sensor or wiring issue.
The maximum continuous duty cycle should never exceed 85%.
Ignition (IGN) F Models Only (Fuel only models will not display ignition parameters)
A positive sign indicates that the ignition timing is after TDC. If timing is after TDC, ignition
programming could be wrong, or the knock sensor could be set too sensitive, picking up engine noise.
Having ignition timing after TDC will cause major loss off power and possible engine damage.
IGN
IGNBTDC.JPG
A negative sign indicates that the ignition timing is before TDC. Ignition is normally BTDC.
IGNATDC.JPG
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