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Old 08-16-2005, 02:14 AM
stevenstevensteven's Avatar
stevenstevensteven stevenstevensteven is offline
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Join Date: May 2001
Location: NE Florida
Posts: 200
"NOx is produced when the combustion temperature is high. You might just pass if you short the aux fan switch for constant operation."

Moneypit SEL, are you suggesting that I short the aux fan so it is always on? I have noticed for some time that the engine operates at high temperatures. I believe I have a leak or something else that has caused a pressure loss in the cooling system and have not had time to diagnose it. Do you think this high temp operating condition could cause the higher NOx?
1989 260E (276K miles)
1995 E320 (50K miles)
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