TSFI B8 A4 2.0T quattro PCV replacement options

[doublespeeded]

Hi guys,


im looking at doing stage 2 tune (or do they call it "chip") to the car. so im stocking up on the necessary ususal parts; such as Diverter valve, catch can etc.

However, ive heard that the Audi PCV valves are crappy and should be replaced. But I hadn't heard whether there is an 'improved' or updated part.
can anyone point me in the right direction for what I should buy?

To satisfy the people who are vigilant with the SEARCH forum function, well I did do a search and found only one piece of info. Which is the o34 PCV replacement for OEM has caused an irregular idle for some users.

my car currently has 38,000km (23,612mi)... should it require replacement to go into stage 2?

Cheers

[s4baby]

You don't need a diverter valve or catch can for a stage 2. Just a high flow cat and a matching tune.

I just replaced my leaking PCV valve with a factory replacement for around $80 bucks from the dealer. Running great with GIAC stage 2 tune and 034 high flow cat.

[RG4]

You don't NEED an upgraded DV for stage II, but if you haven't replaced the factory one it's probably a good bit of preventative maintenance to do it. Why not go with the GFB DV+. $130 I believe. Stock would be fine though


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[S4'ed]

Just get the latest revision of the factory PCV unit, about $140.

[doublespeeded]

You don't need a diverter valve or catch can for a stage 2. Just a high flow cat and a matching tune.

I just replaced my leaking PCV valve with a factory replacement for around $80 bucks from the dealer. Running great with GIAC stage 2 tune and 034 high flow cat.

You don't NEED an upgraded DV for stage II, but if you haven't replaced the factory one it's probably a good bit of preventative maintenance to do it. Why not go with the GFB DV+. $130 I believe. Stock would be fine though


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Just get the latest revision of the factory PCV unit, about $140.

Thanks guys for your prompt and helpful responses.

Yeah I heard the divertervalve isn't crucial but it should be replaced for longevity.
Yes I am looking at the GFB one, which is popular. I am wondering, I am to replace it myself, will it throw an engine error code? or is it just bolt on and no issues?

My remaining questions are, will the hiflow cat increase the exhaust tone? and what is the part number and/or link to the updated PCV? I couldn't find it on ECS tuning.

Thanks heaps

[doublespeeded]

anyone ? im looking to purchase these parts in the next day or so from USA. so if you can provide me with the updated/revised PCV, that would be great.

As I don't see the word or comment; 'revised' on any of the websites.

[Project Quattro]

anyone ? im looking to purchase these parts in the next day or so from USA. so if you can provide me with the updated/revised PCV, that would be great.

As I don't see the word or comment; 'revised' on any of the websites.

Call the Audi dealer and ask them for the pet number for the most recent PCV for your car, they'll be happy to give it to you.


Sent from the Pedal Responce boardroom

[doublespeeded]

Call the Audi dealer and ask them for the pet number for the most recent PCV for your car, they'll be happy to give it to you.


Sent from the Pedal Responce boardroom

Ok so there are no aftermarket options such as GFB or Forge etc etc?

[s4baby]

Ok so there are no aftermarket options such as GFB or Forge etc etc?

I don't believe there are aftermarket PCV options unless you get a catch can kit. As we said, just go with a factory replacement PCV and call it a day.

[elscotto80]

Thanks guys for your prompt and helpful responses.

Yeah I heard the divertervalve isn't crucial but it should be replaced for longevity.
Yes I am looking at the GFB one, which is popular. I am wondering, I am to replace it myself, will it throw an engine error code? or is it just bolt on and no issues?

My remaining questions are, will the hiflow cat increase the exhaust tone? and what is the part number and/or link to the updated PCV? I couldn't find it on ECS tuning.

Thanks heaps

The GFB is a direct replacement which uses some parts from the factory DV. Instructions with the unit are self explanatory. If you do everything correctly, there should be no error codes. I ran mine before I had a tune without issue and it works great now with APR Stage II. Good luck.

[doublespeeded]

I don't believe there are aftermarket PCV options unless you get a catch can kit. As we said, just go with a factory replacement PCV and call it a day.

Ok that makes sense now.

I may just buy a catchcan kit which comes with their own PCV and this way I can kill 2 birds with 1 stone. (catch can and a different PCV)

cheers

[doublespeeded]

I thought id ask one last question before I proceed.

If I am to install a catchcan kit (which includes its own PCV) myself, is there any chances of throwing an engine code light?

Thanks & regards,

[doublespeeded]

I thought id update myself on this one... lol PCV valve replacement does not throw any codes.


Im wondering, if anyone can shed some light in experience.

how differently does a piston style DV effect on driving in comparison to a diaphragm type OEM DV (that hasn't got any issues)???

obviously if the diaphragm tears, then there's all sorts of issues and compromise in performance... but im wondering if there are any noticeable difference with a perfectly operative Piston DV vs Perfectly operative Diaphragm type DV?


cheers.

[ducati]

The PCV valve do you really need to go to the dealer for a update of software if you install the updated version?.

[Jacon]

The PCV valve do you really need to go to the dealer for a update of software if you install the updated version?.

yes

[jfo]

The PCV valve do you really need to go to the dealer for a update of software if you install the updated version?.

It's hard to get specifics from Audi, but this is my understanding of the operation of the stage1 fix. The new PCV results in a different vacuum/pressure level in the crankcase to alleviate the tendency for blowby. This new condition may cause a sensor to throw a code, which is why a software update is needed. It isn't clear if this will always happen, only happen under certain driving conditions, or perhaps never happen.

[Alex1188]

It's hard to get specifics from Audi, but this is my understanding of the operation of the stage1 fix. The new PCV results in a different vacuum/pressure level in the crankcase to alleviate the tendency for blowby. This new condition may cause a sensor to throw a code, which is why a software update is needed. It isn't clear if this will always happen, only happen under certain driving conditions, or perhaps never happen.

I was told the only thing the update did was change the parameters to check oil level more often, that way they could see oil level over a period of time that way they just aren't replacing engines for anyone else who says they have oil consumption issues.

[yo vanilla]

Regarding codes, I replaced my pcv last weekend and got a P2626 code after a day or two ('13 A4 allroad). At first I noticed the hardware may not have been tightened fully (possibly presenting a leak); after re-tightening and clearing the code it came back two days later. Moving on to more troubleshooting...

[Smac770]

P2626
O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 1)
O2S signal front > 4.81 V

Looks more like an electrical circuit issue with the lambda sensor (front O2 sensor) rather than anything to do with the fine oil separator (aka PCV).