Hi,i have an 88 jeep,4.2 liter/with carb. question-is nox higher with timing at 32 degrees btdc or at 9 degrees btdc?? thanks

Automobile emissions control

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philco

Hi,i have an 88 jeep,4.2 liter/with carb.
question-is nox higher with timing at 32 degrees btdc or at 9 degrees btdc??
thanks

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