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Re: 85 nissan PU 2.4l carb. excessive CO @15&25
Posted to Emissions Forum on 4/12/2000

Hi Aaron,

This one idles in open loop, very little or no dwell at idle. Bring it up to 2000RPM to check. Make sure the PCM (take the driver seat out) has good power and ground, also make sure the vacuum switch on the right fender works, this switch is import... Login to read more.