I haven't change PCV. But ask spare part shop RM25.
Labour ... if can do yourself should be good.
I saw in video for other car, PCV is easy replace by yourself.
But need to know WHERE is the PCV for Wira ...

on the top right corner of the valve cover there is a vacuum hose connecting to inlet manifold. That is the PCV valve. Just use size 12 wrench to remove it and replace will do. Just apply tiny bit of engine oil on the thread for easier installation.

This post has been edited by GKWong: Nov 3 2014, 03:46 PM

Thank you GKWOng, your advise is appreciated
Also, asked to spare part shop fella to point to me
Bought it for Rm20 ...
Everything as per the attached photo.
Will install as instructed by bro GKWong



Attached thumbnail(s)

Thanks man
btw the hose size how many mm?

Not bad the price, i will diy tmr.
Got feel any difference?

This post has been edited by arza04: Nov 3 2014, 06:58 PM

Have not change yet. Will do it tomorrow after work.
I will use back the old hose.
I don't think will have any feel. Just that engine won't makan minyak.
So can use back Semi-syn for next service.

This post has been edited by HuiChyr: Nov 3 2014, 07:08 PM

Hose inner diameter is 8mm. But if the hose still nice and no crack then no need replace is okay.
Diff after replacing the valve depend on the condition of your existing PCV valve itself. If it is totally blocked then your engine gasket might leaking out a bit due to excessive pressure built up inside. And also vapour inside will degrades engine oil faster. If the PCV valve is allowing too much air moving into manifold at idle then u might encounter engine knocking or oxygen sensor detected system is too lean then it will try to compensate by injecting more fuel hence increases in fuel consumption.

Thanks bro, u help a lot
I notice my engine got oil stain, maybe pcv valve kong already. Does this pcv has anything to this case, when idle, I rev the car, let go the gas pedal, the rpm drop below idle rpm to 600rpm+- then rise back up to 900rpm shortly

Wow .. that would be great . Good that you advise the physics of the valve.
Very helpful information there. THank you.

not a symptom from PCV valve though... seems more like the issue with throttle body. Your car is MMC or VDO? Mostly MMC got this issue as I seen before from my friends ride. Maybe throttle body dirty or the idle screw need some adjustment Not so sure...

Vdo

Our VDO throttle body doesn't have idle air intake jet adjustment like MMC. When the pedal is depress, the throttle butterfly is just actually stuck open around 5% to just let slip thru the upper and lower part of the throttle body. So if it is dirty and causing obstructed airflow then it can cause RPM drop after depressing the pedal. But the ECU will quickly correct back the idle RPM by controlling the throttle body servo motor.
If your throttle body is already cleaned then I also not sure what might be causing it...

Yeap, my mech also dont know why and he suggest me change tb. Since it never bother much, i will just continue use it

as for my car..1.5 auto 3 speeder..managed to get around 430km with 30liters of petrol..i think ok kot..btw plan to install throttle controller..pedal feel heavy la..already cleaned up the tb..

Throttle Controller???
Wira is using mechanical throttle with cable. Not the new electronic throttle. What kind of throttle controller do you mean? Mind to enlighten us?

owh ya..forgot that wira using cable

I thought got what new product that can upgrade for us... hahaha

For auto, you can get 430km is pretty good.

Anyway, change my PCV valve. During idling, my car maintain at 1000rpm. So that one good sign.
Next to factors I'm hoping for ... FC consumption improve and no makan minyak in engine.

This post has been edited by HuiChyr: Nov 5 2014, 04:03 PM

may i know what happen to your pcv valve?

I don't what happen to the old one. But it is 15yrs old so might as well change it.
I noticed my engine makan minyak and FC getting worse.
Suspect the PCV need to change especially the makan minyak part.

Pls scroll back to see the function of pcv as mention by GKwong
or go here for detail explanation
http://www.autoshop101.com/forms/h63.pdf

This post has been edited by HuiChyr: Nov 5 2014, 05:10 PM

Damn that fuel consumption is so good!! Got any mod?
Mine 30 litre 350km only stock from factory

Thats good news! Good for you

What kind of cleaner can we use to clean throttle body? They sell at sparepart shop or hardware shop?