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From purely combustion standpoint.... 700 1989

posted by  someone claiming to be MittenHed on  Sat Jun 28 14:54 CST 2003 [RELATED]

The 15 mph numbers, from combustion viewpoint, indicate too lean a mixture, except that if it was that simple the HC would be much lower. Since everything straightens right out when you pick up a little speed, I'd have to wonder if the injectors have a poor pattern at low flow. The high NO and O2 would indicate that there is enough oxygen getting in, combustion is taking place at a high enough temperature (maybe higher than it ought to be) to create NO, but that much of the fuel is not being burned. Poor fuel atomization will produce this result. Just a wild-ass guess, but a bottle of Techron might not be a bad idea. Unless you have done it already.






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