sometimes When AC on Bumbaba rpm/idle (400-500) ang normal idle 800 when ac on

**alyx1705** · October 13th, 2009 12:54 PM

nissan already replace the head gasket, and i think it's not the head gasket but if you prefer to test it,how will i test it?...

Yes A/C is working properly, its blowing cold air, There was no clunky noise, engine wouldnt die it only reaches up to 500-300 but when its about to die i press the gas pedal together with the brake, so i use my two feet to have thenormal rpm.

no, When i Shift to drive it actualy goes down 500-400rpm.

When im driving and pressing on the gas pedal my rpm is good but while im about to stop specially in traffic and stoplights and pressing the brake, the rpm will eventually drop again to 500-400 like the engine stalls. It's like when ac on the normal idle is 400-500 but the real normal idle of my car would be 750-900 right??
what seems to be the problem? i think this happens only when my engine is already warm and i started it again, the rpm would drop to 400-500 , but when in cold start my idle is normal when ac on.

**simarun** · October 13th, 2009 01:24 PM

This is exactly what my problem before, then pinalitan lang ang mga ito. Cost including labor nasa 500 lang sa mga Aircon shop. Hope it helps.

**alyx1705** · October 13th, 2009 01:58 PM

ano po tawag jan?

**alyx1705** · October 13th, 2009 02:21 PM

ano po tawag jan? and saan banda nakalocate yan??

**rusem** · October 14th, 2009 11:39 AM

sakit ng exalta yan. posted the same thread topic years before for my gf's exalta... di alam ng casa gagawin dyan. my gf' brought it to speedyfix for diagnostics... they found an errant sensor. guys from speedyfix recommended a shop at banawe. that solved the problem. can't rememeber what shop it was years ago na. maybe you want to try bringing it to a shop who can read diganostics for you first.

**alyx1705** · October 14th, 2009 11:44 AM

i see, Parang ayaw ko na nga ibalik sa casa hindi ko alam kung ginagawa ba talaga nila doon ung mga dapat gawin, what sensor are you talking about? air flow sensor? if air flow sensor narewired nadin ng casa un, what shop would you recommend? wala kase ako alam na magandang shop. tagal ko ng problem to eh.

**4JGtootsie** · October 14th, 2009 12:55 PM

Its probably a sensor from AC compressor. When compressor is engaged it sends signal to the ECU to increase RPM. Older models use the step up vacuum switch and vacuum actuator like that in the picture. I dont know what is in use in your exalta.

**alyx1705** · October 14th, 2009 09:55 PM

i Already ask an aircon specialist but they told me that this problem doesn't affeect ac compressor but i don't have any idea if My car had an ac compressor sensor. Can you tell me what's that best way to do?