This is normal as the MSD ignition is now controlling the ignition timing.

With the MSD ignition installed, the ECU will display code 21 during the self diagnostics procedure. The primary voltage is increased to 470 volts and each multiple spark provides 110 milliJoules of spark energy that lasts last for 20 degrees of crankshaft rotation. The MSD ignition improves power, quickens throttle response, smooths starting and idling, reduces spark plug fouling, improves mileage and reduces emissions. Without the diverter, the MAFS will send a false reading and cause the ECU to run in fail-safe mode. Use a rubber grommet between the mounting bracket and engine hook to prevent damage to the intake tube caused by engine vibration.Īn airflow diverter is included to direct airflow toward the MAFS. The only down side to this modification is lost of low end torque. This intake replaces the original air box and filter housing to increase horse power up to 15% and provides better fuel mileage. K&N's PreCharger and Dr圜harger filter wraps and the Airforce Pre-Cleaners help extend the service interval when the vehicle is used in very dusty conditions. When cleaning, DO NOT over oil the filter! Over oiling will cause the filter to leak and may damage the Mass Air Flow Sensor (MAFS). These filters are washable and reuseable, lasts up to 50,000 miles before servicing and has a 10 year / million mile warrantee. Designed to increase horse power, boost accelleration and improve fuel economy. K&N filters replace original paper filters to increase air flow with excellent filtration.

Nissan ka24de timing procedure