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I have a 89 dodge ram 4x4 and the A/C code keeps coming up but the truck never had A/C. Anyone know what causes this and how to remendy it ? Also it has a single port fuel injection system.....the truck runs fine when cold or half way warm but lacks power when at operating temp also hesitates any ideas ? (the O2 sensor has been replaced and recently tuned but timing was never checked )
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