The extra load of my '94's Accord's AC often causes such a drop in idle speed that the engine dies when trying to start up after a traffic light change, especially on a slight uphill. This forces me to turn off AC when stopping at traffic lights and turn it on again after moving. Without AC the idling RPM is about 750, which is about normal.
Isn't the car's computer supposed to compensate for the AC load?
"Cameo" wrote in news:i1bcj1$n3p$ snipped-for-privacy@news.eternal- september.org:
Yes. That's the A/C Idle-Up signal.
From what I see in the various shop manuals, failure to idle-up is usually due to a corroded or internally-broken wire between the compressor, the compressor clutch relay, and the ECU.
The ECU sees the A/C signal from the wiring, then boosts idle to compensate. If that signal never comes in, the ECU will not know to increase idle.
Thanks. This info at least gives me a leg up when I talk to my mechanic about this problem and see if he also knows about it.
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