There,I picked up a 91 Accord LX, I'll start with my problem my car runs fine, smooth without the ac on about 750-800 RPMs, then when i turn the AC on the idle drops down to about 500 RPMs and barely runs at all, just wondering if anybody hads any advice or tipsI have done some work to the car since im austin tx and need it to pass inspection and here is a list of things i have done:-Tune up(plugs, wires, pcv, new intake, new intake gaskets, cleaned the EGR valve and passages, cap, and rotor, o2 sensor)-new cat converter-Valve cover gasket-oil pan gasket-timing belts and water pump-new motor mounts including rear-Air boost valve block off-Fast idle valve tightend up

 

Clean throttle body bore, throttle plate (both sides), and IACV carefully w/ throttle body cleaner. IACV compensates for AC load and when blocked idle will drop as you've reported. Check DIY forum for more guidance.

good luck

 

Thanks a bunchZach