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define MCS & device box please for a foreigner
can't find them in the manual or the 4x4 abbreviation list


Mixture Control Solenoid. It is the primary fuel metering device that the computer controls during cruise/acceleration to keep your mixture in check. On my '88 it has a red and a yellow wire that enter the top of the carburetor, but you'll have to remove the air cleaner to see it. Your colors might be different. But either ground it out or remove one of the leads and you will force the entire system to go as lean as it can.

Chris