my NOx emissions doubled since last time

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01-17-2006, 12:45 AM

#16

barelyrunshalfthetime

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Quote:

Originally Posted by Bill Swift

Richening up the mixture a bit, within the HC and CO limits will probably help with your NOX readings. As I stated before, if you are running too lean higher Nox readings can result. Do you recall what the other readings were? Anyway, turn the AFM adjustment screw clockwise to richen the mixture, but try to do this on a gas analyzer to make sure you don't overdo it.

we actually cracked open the dme today to see about adjusting the screw, and eneded up needing to dremel 2 screws off to get the cover off (very scary). anyways we encountered cicuit boards on both sides and did not see the adjustment screw. i guess u also need a special tool to adjust it as well, (looking at a pic of it on a website). we couldnt let the car sit in the garage all week, so my dad threw it back together and said "i aint doin that again" because we dont wanna f somethin up with the cicuit boards. we r either gonna pay the fine/penalty for not passing emissions or just get a new cat welded in. both come to about the same cost. thanx for the help tho.

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01-17-2006, 03:00 AM

#17

Legoland951

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If you turn the AFM screw, it will ONLY adjust your idle mixture. Pop the top off your AFM for the main adjustments but make sure you know what you are doing or else you are going to be in for one heck of an experience.