Black smoke / black spark plugs / high fuel consumption
NOTE: Your engine ecu-map is set to run a little rich at idle (for easier starting and cold running), consequently ‘black’
spark plugs may be seen if inspected immediately after a period of ‘idling’. To check mixture is accurate: -
Run the engine on the ground at +/- 2300 rpm for three minutes. Stop the engine using the ECU switch. (do not throttle
down to idle first). Allow engine to cool and check spark plugs. If the spark plugs are grey / clear, the mixture is correct.
•
AIR PRESSURE SENSOR (APS) PROBLEM/INSTALLATION ISSUE
If the APS (installed in the ECU) is not reading the air pressure ‘at
the entry to the air filter’ an incorrect fuel/air mixture will occur.
Inspect line condition, looking for cracks, kinks, connection issues.
Make sure that the line is not blocked (DO NOT BLOW INTO THE
LINE WHEN CONNECTED). DO NOT ATTEMPT TO OPEN THE ECU.
Install ULRead to find out which sensor is misreading/not working correctly.
- Replace the TPS, ATS or OTS, if necessary
APS
