Rough idling when aircon thermostat is on....

**acergy09** · June 23rd, 2013 02:36 AM

Mga bros, I have idling problem in my Isuzu Sportivo 2005 model, manual trans, non turbo....bakit kaya pag nag init na ang makina at naka On ang aircon at Nag a automatic ON yung thermostat, masyadong mapalag ang makina? as in pakiramdam ko halos buong sasakyan nanginginig....then pag automatic OFF, nawawala naman yung sobrang vibration.....

.....lalo pag naipit ako sa traffic, grabe vibrate ng buong sasakyan, kaya ginagawa ko, ini OFF ko talaga yung thermostat, bale blower lang gumagana....hope someone can help me, kasi hindi talaga ako comfortable pag ganun ang sasakyan ko...pina check up ko, ganun pa din eh, pinalita lang ng alternator belt, yun ang nakitang may crack pag pa check up ko...pero di nawala yung concern ko....thanks in advance mga bros....

**Chinoi** · June 24th, 2013 09:40 AM

Pa check mo na rin kaya yun rubber Engine Mount. Baka sira na at sayad na yun bakal sa bakal.

**ghosthunter** · June 24th, 2013 10:06 AM

Originally Posted by acergy09

Mga bros, I have idling problem in my Isuzu Sportivo 2005 model, manual trans, non turbo....bakit kaya pag nag init na ang makina at naka On ang aircon at Nag a automatic ON yung thermostat, masyadong mapalag ang makina? as in pakiramdam ko halos buong sasakyan nanginginig....then pag automatic OFF, nawawala naman yung sobrang vibration.....

.....lalo pag naipit ako sa traffic, grabe vibrate ng buong sasakyan, kaya ginagawa ko, ini OFF ko talaga yung thermostat, bale blower lang gumagana....hope someone can help me, kasi hindi talaga ako comfortable pag ganun ang sasakyan ko...pina check up ko, ganun pa din eh, pinalita lang ng alternator belt, yun ang nakitang may crack pag pa check up ko...pero di nawala yung concern ko....thanks in advance mga bros....

Have a mechanic check the aircon belt if it too tight. Also have the compressor & related pulleys checked if it still turns properly and freely.

**dr. d** · June 24th, 2013 12:43 PM

you might have a malfunctioning idle-up system.
an idle-up increases the idling rpm of the engine when your aircon is on, because aircons eat up significant engine power. if they do not idle up, you would get a rough engine idling. namamatayan pa nga...
but why don't you have this rough idling when the engine is freshly started from cold? because your engine choke is still functioning. it functions like your idle-up, but only when the engine is cold. when the engine gets hot, this choke signs off. and that is when your problem starts..
... i think..
good luck.

oops... diesel pala. at isuzu pa.. ewan ko if if my explanation still holds..
iwan ko na lang dito, at baka may makinabang..

**deafault** · June 24th, 2013 01:37 PM

Watch the rpm, does it drop/surge? Have your a/c system checked first.

**jaypee10** · June 24th, 2013 02:47 PM

baka busted na ung compre bearing or clutch ng compre...

**Vootlog** · June 24th, 2013 07:10 PM

baka sira na ang mounting bracket ng compressor or baka maluwag mga bolts.

**acergy09** · June 24th, 2013 08:07 PM

Thanks sa reply mga bros...na check ko na lahat sinabi nyo...pero sa Injection pump na lang ang hindi....may effect din ba sa injection pump ung pag activate ng aircon thermostat?kasi dati tumataas yung RPM ko, pag nag engage yung thermostat, ngayon hindi na gaano nataas yung gauge, pero yun nga epekto, nanginginig sasakyan na masyado.....

Meron bang timing o activation system sa Injection pump yung pag engage ng clutch sa compressor??...baka po wala sa timing yung injection pump ko ano?...

Dr. D....malapit na yng input mo sa problem ko, pag malamig pa naman makina, smooth pa engine, once maginit na nga yung engine, tapos nag aircon, saka nag start yung engine surge...may choke din ba ang diesel engine?

Ok pa naman siguro compressor ko ano mga bros, kasi malamig pa naman buga ng hangin eh...

**Manilablock** · June 24th, 2013 10:33 PM

Sir try mo kaya next fill sa ibang gas station, baka madumi ang fuel sa suki mo

**acergy09** · June 26th, 2013 02:30 AM

Originally Posted by Manilablock

Sir try mo kaya next fill sa ibang gas station, baka madumi ang fuel sa suki mo

posible din siguro sir na madumi na masyado fuel tank saka yung mga linya ano?ilang beses na kasi nagbara, sa primary feed pump, pero never ko pa napalinisan fuel tank ko..mag 8 years na yung car ko..