Help -- A/C guru needed - ZR-1 Net Registry Forums

bike01 · 10-26-2005

My '91 has an intermittent problem. Sometimes when I turn on the A/C my rpm drops to around 400 rpm and it will stay there, this also causes it to stall sometimes. Sometimes when I turn on the A/C it will idle at 650 and be fine, but it seems to screw up for a day or so then be okay for a day or so. My question is if there is a relay somewhere that I can check or replace. If so where is it physically located and what does it look like. I've bypassed all of the pressure switches on the A/C line so I don't think they are a problem. The ECM just isn't getting the signal to increase the RPM when the request for A/C is on. Car runs and idles fine with the AC off.

10-26-2005	#1
bike01 Join Date: Apr 2004 Posts: 14	Help -- A/C guru needed My '91 has an intermittent problem. Sometimes when I turn on the A/C my rpm drops to around 400 rpm and it will stay there, this also causes it to stall sometimes. Sometimes when I turn on the A/C it will idle at 650 and be fine, but it seems to screw up for a day or so then be okay for a day or so. My question is if there is a relay somewhere that I can check or replace. If so where is it physically located and what does it look like. I've bypassed all of the pressure switches on the A/C line so I don't think they are a problem. The ECM just isn't getting the signal to increase the RPM when the request for A/C is on. Car runs and idles fine with the AC off.