OK, that makes sense. But a lean mixture would also hurt here, maybe get he mixture correct and also connect the brown wires. The California cars had been delivered with those wires connected and your explanation makes sense.
Thanks.
Quote:
Originally Posted by Quicksilver
+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.
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