AEM 30-6101 Series 2 Plug & Play EMS User Manual

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This product is legal in California for racing vehicles only and should never be used on public highways.

4) Wiring Accessories to the EMS:

Please follow this suggested wiring diagram when adding accessories such as UEGO
gauges, MAP sensors, IAT sensors, or switches for use with the EMS. Signals marked
‘tapped’ should be spliced onto the existing wire without disconnecting the original
circuit. All other signals should intercept the wire, disconnecting the original circuit. Note
that wire polarity is not important for the Air Temperature sensor.

5) Ready to begin tuning the vehicle.

Before starting the engine, verify that the fuel pump runs for at least 2 seconds when
the key is turned on and there is sufficient pressure at the fuel rail.
If a MAP sensor is installed, check that the Engine Load indicates something near
atmospheric pressure (approximately 101kPa or 0 PSI at sea level) with the key on and
engine off. Press the throttle and verify that the ‘Throttle’ channel responds but the
Engine Load channel continues to measure atmospheric pressure correctly.

Start the engine and make whatever adjustments may be needed to sustain a safe and
reasonably smooth idle.
Verify the ignition timing: Select Wizards>>Ignition Timing Sync Wizard from the pull-
down menu. Click

the ‘Lock Ignition Timing’ checkbox and set the timing to a safe and

convenient value (for instance, 10 degrees BTDC). Use a timing light and compare the
physical timing (measured at the crankshaft pulley) vs the Ign Timing value indicated by
the EMS. Use the Sync Adjustment Increase/Decrease buttons to ensure the actual
timing on the crankshaft pulley matches the

‘Ign Timing’ channel indicated by the EMS.

Note: This calibration needs to be properly tuned before driving the vehicle. It is
intended for racing vehicles and may not operate smoothly at idle or part-throttle.
NEVER TUNE THE VEHICLE WHILE DRIVING