NickT

I have noticed that for the past few weeks I can hear a relay clicking when the key is out of the ignition. Today I started the install of my ARM1 and noticed that the EZK relay was clicking once every 7 seconds. Um, anyone have and thoughts on my this realy would be doing this? The realy never stops clicking until the engine is started...

On maybe a related note, after installing the ARM1, the display bounces around all over the place, second lean light up to the second green light while cruising. During hard acceleration it goes rich, and deacceleration goes lean as expected. But why the bounce when crusing? Failing O2 sensor?

Thanks...

Nick
'88 S4 5spd.

SilverSFR

When your fuel is properly adjusted and your ECU is operating in closed-loop mode, the display on the ARM1 will sweep back and forth (dither). This will normally occur at idle, light cruise (constant speed) and during moderate acceleration. At wide open throttle the ECU typically goes open-loop and the ARM1 will display the fuel mixture.
The dither pattern can be used to adjust the fuel mixture. When too far off, the display will not dither at all. It will stick on the lean or rich side. When close, it will favor one side or the other. When properly set, the dither will be smooth and balanced.
We believe to achieve max power without damaging the engine, the desired air/fuel mixture would be around 13.2:1 or the first blue led on the ARM1 display. Forced induction motors should be run at a more rich setting for safety. We recommend mixtures between 12.0:1 and 12.5:1.
(Quote)
Splitsecond website


SilverSFR

NickT

Thanks for the reply, looks like I am ok then... Still have to figure out why my EZK relay is clicking..