Smooth idle with air-con on

[Mikhai]

Hi guys, anyone here has a proton wira with smooth idle when the air-con is on?

Two of my friends have very smooth idling even the air-con is on with full power, but mine sucks...

Any idea to smoothen it? Thanks.

 

[sakuraguy]

go for a tune-up at proton service centre, but it wont last long, 2 months then its unstable again :) ...

 

[trex92]

hmmm... is ur wira EFI or carburetor...? One tip for EFI is to reset the ECU by disconnecting the battery for about 5 minutes and then re-connect it back. I suspect that this is the method used at Proton Service Centre (though they reset the ECU using the handheld device). Coz last time i did ask a Proton technician who was with the Shah Alam plant that my car was running quite roughly he said to reset the ECU.

 

[zan]

for carb wira, there is actually a 2nd idle screw adjuster to adjust the engine idle speed with acond on.
how to adjust..

1st, start engine without aircond. adjust idle if necessary with no.1 idle screw. normally, about 700-800rpm but if engine vibrate due to mounting not good, increase the speed.
2nd, switch on aircond. if too low, adjust the idle speed higher using idle screw no.2. maybe about 900-1000rpm to compensate for compressor drag.

for EFI, we cud only adjust engine idle speed while acond on idle speed is controlled by ECU. you can try resetting the ECU by removing the battery terminal. otherwise, visit any service centre with MUT tester and ask them to tune idle speed smoother.

mind you though, leaking vacuum hoses connecting to aircond system may also affect idle speed. sometimes the a hose may come out loose. check first.

 

[Mikhai]

Thanks for all the inputs. Mine is 2004 wira special edition. Will try disconnect the battery to reset the ECU first.

Hi Zan, mind to tell me what is MUT and where is the vacuum hose? Thanks.

 

[zan]

MUT is the electronic tester used by EON and proton edar. 1st generation only for wira EFI and perdana EFI. they cant be used to check the siemens ecu like urs though.

at toyota theyre called checker. at kia theyre known as tester. or maybe the other way around. he he... i think ur car still under warranty right. just complaint to them and let them kautim. prepare to spend some time there.

or else, find an authorised service dealer for a quicker service. but they may not have MUT.

vacuum hoses is black in colour and are soft rubbers with no fluid in it. check all those and make sure theyre connected properly. normally the hoses are linked at the engine firewall, also known as engine partition panel. where the wiper motor is located.

 

[huakenny]

MUT is the electronic tester used by EON and proton edar. 1st generation only for wira EFI and perdana EFI. they cant be used to check the siemens ecu like urs though.

at toyota theyre called checker. at kia theyre known as tester. or maybe the other way around. he he... i think ur car still under warranty right. just complaint to them and let them kautim. prepare to spend some time there.

or else, find an authorised service dealer for a quicker service. but they may not have MUT.

vacuum hoses is black in colour and are soft rubbers with no fluid in it. check all those and make sure theyre connected properly. normally the hoses are linked at the engine firewall, also known as engine partition panel. where the wiper motor is located.

tat is DIAGNOSTIC TOOL..rite?

not smooth when aircon on....if eveything ok..then u might need vs n grounding...haha...it might works..

 

[ftzone]

perhaps.. the throttle body just need some cleaning. :)
lose vacuum hoses may be a culprit as well.

 

[huakenny]

perhaps.. the throttle body just need some cleaning. :)
lose vacuum hoses may be a culprit as well.

yakan..forgot to mention tb cleaning....

 

[Mikhai]

Throttle body cleaned before and then send for timing tune.,, problem still there.

This problem already day one to now. I did complaint to EON when under warranty, and the respond was "nasib la, proton ma".... Very bad experience with proton car. I really won't consider to buy a proton again, feel that been cheated.

 

[K_Takuya]

try get vs and grounding cable....

 

[SkYwAlKeR]

the best is still reset ur ecu or carb... easy and cheap maintainence...

 

[Mikhai]

What is VS and grounding cable? Where to get?

 

[SkYwAlKeR]

VS is voltage stabilizer...
grounding cable is to ground free electrons...
both can be work separately, but if used together get better effect lo...

can get in any accessory shop...

 

[huakenny]

What is VS and grounding cable? Where to get?

Grounding can get from zth member..me (Huakenny),c-ground,votech.....

VS can get from Khguan,Votech....

 

[Mikhai]

Hi guys, I have tried the reset ecu method (plus I cleaned the throttle body) = NO USE.

Is instralling the VS and grounding cable really work?

How much and which brand is better? Thanks.

 

[SkYwAlKeR]

i think VS and grouding cable help a little only... the best is reset/tune ur ecu/carb....
can try RMK or Pivot VS... for grounding cables, jz get a bigger one...

 

[satria_95]

I had idle problems too. Fixed up my idle stability controller (ISC), which controls the idle when the air cond is turned on. It was working fine till a few months later, the ISC died again. This time, I changed the entire throttle body. Now, it's good and fine. Only been about a week + that I changed it though. RM850 for original APM proton throttle body. Note that changing the ISC won't guarantee a long time usage as the ISC gears are new, but the throttle body is old. There are some who have luck after changing the ISC gears, where they had no more idle problems.

Problems I encountered
- When turn on air cond, the idle drops to quite low when the air cond fan is spinning. Then when rev high and set to neutral, the rpm drops to zero and engine dies. This is very dangerous because you won't want your engine turned off while you're driving, especially those with power steering.

- idle goes up, down, up, down, up, down..... many times in a very short time frame. It's like having a high cam.

- car vibrates when air cond fan starts spinning, which causes the rpm to go down a bit. This car vibrating is caused by the engine mounting. Change the mounting if it's due time.

Check this old thread out about idle problems, particularly in proton cars.

http://www.zerotohundred.com/newforums/showthread.php?t=35050&highlight=idle+problem

 

[c-ground]

Yes, grounding and VS won't directly help much in the power draining when the compresor is running. This is from someone dealing with car grounding system almost everyday, experimented with not less than 50 cars in the past 6 months. Better believe it.

However, grounding will help in stablizing the ignition thus more stable idling (as this is the slowest, also the most unstable speed the engine is normally running). So, indirectly, it helps a little and that's the only way it helps. Not by removing an load from the engine. Grounding the compressor won't help.

About "getting a big cable" for grounding purpose. I believe that what we have is the best, at least amongst the home-made "brands" that you can find in ZTH. Cheerz! ;)

 

[ray11]

Last time also face the same prob... install volt stabilizer
& grounding cable improve a bit onli. Then onli i chg fuel
reg for more power... till now engine still running smooth
when air con is on max.My exp....