Erratic idling when aircon is turned on.

**jethers** · June 13th, 2009 05:26 PM

Hi All,

Need your advise on my Corolla 95. Recently, pag naka-off ang aircon ang idle niya is around 800rpm. But pag naka-on ang aircon, tataas ito ng mga 1K rpm. After mga 30sec babalik uli sya ng 800rpm. The after mga 20sec tataas uli sya ng 1K rpm. Paulit-ulit lang ito nangyayari. Ano kaya ang cause nito? Kelangan na ba palinis at recharge ng freon? Ano mangyayari pag tumagal pa ito?

Thanks in advance.

**ghosthunter** · June 13th, 2009 05:33 PM

have a mechanic check the engine's "idle-up". it might be faulty or dirty.

**macsd** · June 14th, 2009 10:43 AM

how is the aircon performance naman, consistent ba ang lamig or not?
it will go up pagtakbo ng compressor & down pag off ng compressor.
so you can also check your temp setting. set it to full or highest temp.
pag it still ur rpm goes up & down at the same rate, then in addition to GH
mentioned, u can check also thermostat and/or thermocouple.

**white hotrod** · June 16th, 2009 06:36 AM

Have your servo checked.yan ang nagcocontrol ng idle pag nka on aircon mo.palinis ka din throttle body.PAG MAY TAMA NA SERVO MO,MAGPAKABIT KA BYPASS ACTUATOR PARA MWALA NA PROBLEMA MO.

**jethers** · June 22nd, 2009 04:56 PM

Originally Posted by macsd

how is the aircon performance naman, consistent ba ang lamig or not?
it will go up pagtakbo ng compressor & down pag off ng compressor.
so you can also check your temp setting. set it to full or highest temp.
pag it still ur rpm goes up & down at the same rate, then in addition to GH
mentioned, u can check also thermostat and/or thermocouple.

Apology forgot to mention. Mahina na rin aircon ko parang low na sa freon. May tendency ba mag-off ba yung compressor pag mababa na yung freon? Pano malalaman pag mababa na yung freon? I am planning to have it cleaned and recharged this weekend. Matagal na rin hindi napalinis air-con ko.

**nejikun** · July 14th, 2009 03:03 PM

Have your servo checked.yan ang nagcocontrol ng idle pag nka on aircon mo.palinis ka din throttle body.PAG MAY TAMA NA SERVO MO,MAGPAKABIT KA BYPASS ACTUATOR PARA MWALA NA PROBLEMA MO.

Pwede rin ba ito sa ae92 4af engine? same problem din ang nangyayari sakin eh. up and down ang rpm when AC turned on. actually kakapalit ko lang ng compressor, anyone na naka experience ng same problem na naresolve na? thanks.

**nejikun** · July 15th, 2009 05:02 PM

Helpful info.

[ame="http://www.youtube.com/watch?v=PqNR7PGuE1s&feature=related"]YouTube - how to fix car air conditioning. expert advice[/ame]

pag on and off daw ang compressor, kulang daw sa freon.

**delltek04** · July 31st, 2009 09:34 AM

have a look at the alternator as well.... i had the same issue before... buti na lang di ko muna pinatemporary fix... on the same day, naging ok bigla.. baka natalsikan ng tubig or nabasa yung alternator..

**harimon21** · July 31st, 2009 03:25 PM

Have the same problem with my car. When AC is off the rpm is stable at 800 rpm. The moment AC is turned on the rpm goes up to 800 then down to 400 then up again and down continuously. Happens when idling though and when braking to stop. Could it be the idle control valve? Can it be cleaned DIY?