have the same problem and have been trying to solve it for quite some time now. ISC is the usual suspect, but I have tried several ISCs supplied by a japanese surplus supply shop here in manila but to no avail. Cleaned the throttle body, changed my air flow sensor, adjusted the tps, BISS, and accelerator cable screw ... nothing worked.
What partially solved my problem was to rewire the auxfan motor which turns on at the same time with the A/C compressor and have their relays separated. Partially i meant when the A/C compressor turns on, my RPM still drops dramatically but after 3-5 seconds, it regains to about 950 rpm.
I read in one of the lancer gsr forums that a leaking intercooler could be the culprit. Might as well have this checked.
Next in line for me to check is the wiring from the ECU to the ISC coils and a/c compressor relay also in the ECU. Easier said than done though.
mimmo_gsr <[EMAIL PROTECTED]> wrote:
Hey All,
Got a problem with the idle in my GSR.
Symptoms are that the revs tend to drop below 500rpm when at idle, and
there is a worse drop when radiator fan comes on or aircon or all
accessories (lights, demisters, wipers ect)
I don't think its alternator related as I checked that a while back.
So what I would like to know is can you get the Idle Control unit
repaired/re-conditioned? as a bit of a browse on the net displays
prices of $195 for non gen replacements.
Could an alternator/starter motor reconditioning place re-con an idle
control unit?
Thanks :)
Mimmo
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