Hi All,5.0 1990 estate wagon Feedback Carb

Warm engine, will the air injection system still divert air upstream??It is on this unit. It will send air to all up and down when doing a ASM 2525...Failing on Hc by 5 PPM. (Co .1) ( O2 high 4-6%) (64 Hc) we have a... Login to read more.