Quote:
Originally Posted by scarceller
What's the theory here about bridging the brown wires? When you bridge those you retard the timing slightly, this normally elevates exhaust temps. Are you saying to do this to get the cat nice and hot? I'm worried that this approach would elevate NO even more, no?
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+1 on
rusnak's "connect the brown wire" suggestion.
Elevated exhaust temp isn't where NO comes from. It is from high combustion chamber pressure coupled with high
combustion chamber temps. The temperature in the combustion chamber is higher then the exhaust because the pressure is much, much higher.
The brown "CA / Japan" wire retards the timing 4° to reduce combustion pressures which is to specifically reduce NO emissions.