My 94 Ranger 2.3L runs fine without the AC on. However, when I turn the AC switch to ON, the engine bogs down and runs rough. At idle, it feels like it is going to stall. At cruising speed, it feels like it is missing. The fuel pressure checks good (38 psi KOEO; 31 psi ER). There were no trouble codes stored in the EEC. Any ideas?
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Its normal when the compressor kicks on. You may want to look into giving your truck a tune up, clean the throttle body and especially clean or replace the Idle Air Control valve. You may see a gain in idle with that and a little better performance when you have the AC on