Jojo Neutral Newbie July 8, 2004 Share July 8, 2004 Dear gurus : Since yesterday, my idling rpm drops intermittently from normal 700 to about 300 rpm causing the car to vibrate. Problem is not obviouos when air-con is swithed off. Appreciate any advice on what could be the problem and how to resolve it, please. ↡ Advertisement Link to post Share on other sites More sharing options...
RadX Moderator July 8, 2004 Share July 8, 2004 (edited) Sounds like Sticky Idle-valve sensor to me...where the amount of air regulated in your case is not consistent.. Get it checked...sometimes, if u are lucky it may only need cleaning, else, they may change the whole valve. Edited July 8, 2004 by RadX Link to post Share on other sites More sharing options...
Soya Supersonic July 8, 2004 Share July 8, 2004 could oso be a faulty MAF or lambda sensor sending wrong readings to the ECU. Link to post Share on other sites More sharing options...
Orangie Neutral Newbie July 8, 2004 Share July 8, 2004 When was the last servicing? Could be bo gas Link to post Share on other sites More sharing options...
RadX Moderator July 8, 2004 Share July 8, 2004 (edited) Or the fuel filter liao.....that can lead to idling probs? Edited July 8, 2004 by RadX Link to post Share on other sites More sharing options...
Jojo Neutral Newbie July 8, 2004 Author Share July 8, 2004 Hi, Just service one week before Changed oil filter and cleaned aire filter. Am starting to suspect if the servicing job was done properly. Link to post Share on other sites More sharing options...
Soya Supersonic July 9, 2004 Share July 9, 2004 nowadays 'servicing' is onli simple a oil & filter change and maybe top up a few fluids here n there. doubt it has anything to do wif the idling problem. Link to post Share on other sites More sharing options...
Audiorook Neutral Newbie July 9, 2004 Share July 9, 2004 Dear gurus : Since yesterday, my idling rpm drops intermittently from normal 700 to about 300 rpm causing the car to vibrate. Problem is not obviouos when air-con is swithed off. Appreciate any advice on what could be the problem and how to resolve it, please. Can I ask - what car are you driving? Link to post Share on other sites More sharing options...
Jojo Neutral Newbie July 12, 2004 Author Share July 12, 2004 Can I ask - what car are you driving? 2.4 harrier, 1.5 yrs old Link to post Share on other sites More sharing options...
Ace_t Neutral Newbie July 12, 2004 Share July 12, 2004 check to see if this problem occurs if the aircon is ON or OFF. Then turn OFF the aircon and see if it still occurs when the fan cuts in. If the problem manifests during aircon ON, then it could be that your idle aircon auxiliary valve (IAAC) needs cleaning or replacement. check if those guys did some tuning on your car... Link to post Share on other sites More sharing options...
Ace_t Neutral Newbie July 12, 2004 Share July 12, 2004 new generation cars can reset ECU and all will be ok. now if only they'd tell you where the CTRL-ALT-DELETE key is.... Link to post Share on other sites More sharing options...
Audiorook Neutral Newbie July 12, 2004 Share July 12, 2004 Same engine as the Ipsum then.. 2AZ-FE. Been experiencing the same problem... another Ipsum driver also has the same prob. Seems like got to do with the IAC which sits on the throttle body unit..... Link to post Share on other sites More sharing options...
Jojo Neutral Newbie July 12, 2004 Author Share July 12, 2004 ah sorry ah, what is the IAC ah ? Link to post Share on other sites More sharing options...
Jojo Neutral Newbie July 12, 2004 Author Share July 12, 2004 if not mistaken, once the air con is off, the idling seems ok. Link to post Share on other sites More sharing options...
Ace_t Neutral Newbie July 12, 2004 Share July 12, 2004 ok, so as audiorook mentioned, it's more likely your IAC valve (idle aircon auxiliary) valve. Yes it's got different names for the same purpose. you either need to retune it back, or clean it or replace it... if you got ECU diagnostic kit lagi better... but only provided that item failed.. if it's out of spec, not so easy to detect. There are simple ways to tune it, but I only know for my ... perhaps the concept would be the same. Link to post Share on other sites More sharing options...
Ace_t Neutral Newbie July 12, 2004 Share July 12, 2004 to add on, perhaps you might want to check your air con compressor. It could be on its way to KO land... Link to post Share on other sites More sharing options...
Jojo Neutral Newbie July 12, 2004 Author Share July 12, 2004 ok thanks will be bring it back to the jokers that service my car tomorrow. at least now, have something intelligent to say or not to be BS by them. will update outcome once done, hopefully without any regarding the aircon compressor goin to KO land, , aioyoh, only 1.5 yrs. so fast ah ? Link to post Share on other sites More sharing options...
Ace_t Neutral Newbie July 12, 2004 Share July 12, 2004 hehehe.. could be it was under performing... good luck in your table banging conquest. do post to keep us updated. thanx [reply] regarding the aircon compressor goin to KO land, , aioyoh, only 1.5 yrs. so fast ah ↡ Advertisement Link to post Share on other sites More sharing options...
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