DIY - B6 1.8t - Vacuum line and Check Valve removal/simplification

[7speed]

Yah ill prolly be doing it this week. I still need to run a leak down test to find out wtf i cant get any boost. Maybe if I do this first it will solve the problem

[absolutegtr]

Yah ill prolly be doing it this week. I still need to run a leak down test to find out wtf i cant get any boost. Maybe if I do this first it will solve the problem

well your getting rid of ALOT of vacuum lines, and that could be where a boost leak lies

[7speed]

I really do hope so

[AudiA4_20T]

can someone answer me why capt. obvious and Shawn dont have the drivers side thing... can u just pull that shit out with no CEL? And I guess I have to take off my fender liner?

[7speed]

what drivers side thing ?

[absolutegtr]

the only drivers side stuff that i did NOT list in this DIY is the vacuum resevoir...which is located in the wheel well of the drivers wheel....even if they did remove that resevoir you would NOT be able to see it from a single engine bay picture.

[phoenixr2]

bumping this for some help.
after completing I got a cel for p0444, duh forgot to plug the evap solenoid back in. plugged it in, ran it for a bit and was fine, now its throwing a p0441, for possible incorrect flow I believe it said. Is this not still for the evap system? I was under the impression that I would get a cel for the removed SAI, but not for evap? or am i wrong and p0441 can ALSO be SAI system? thanks in advance guys!

[SoFresh]

Anybody ever done this to a 2.0T FSI motor? Just curious if there are any links out there for a DIY on one...

[absolutegtr]

/\ I am sure the 2.0t uses the same components, possibly, in different locations. If you read those two posted linkes (first thread) and this whole DIY, then you will be able to remove all you components without the need of instruction

[Capt. Obvious]

Anybody ever done this to a 2.0T FSI motor? Just curious if there are any links out there for a DIY on one...

Not really a DIY, but lots of cool info and a great thread:

http://forums.vwvortex.com/zerothread?id=3604286

[Capt. Obvious]

can someone answer me why capt. obvious and Shawn dont have the drivers side thing... can u just pull that shit out with no CEL? And I guess I have to take off my fender liner?

I don't know about Shawn, but mine is still there, it's just been moved out of the way to a less visible place.

[kovalevandrew]

Hi guys,

Going to give this a try this weekend. Mine is a 2001 B5 1.8T... Anything i should know..?

[widgget]

OK, so i'm gonna order one of those block plates from Intergrated Enginnerring and noticed they have a "SAI Resistor" that makes the ECU think the SAI is still there.

if i get this will i still pass all the readiness tests or will i still fail one?

http://forums.vwvortex.com/zerothrea...ostid=37860406

[jaysonlosado]

I have a question...anyone that's done this wanna give/sell me your little gray/black check valves? my gf's car needs new ones, and she won't let me do all that work for her since we live in the great smog state of CA.

Thanks!

[kovalevandrew]

Dude, when she's not looking.... RIP IT ALL OUT!
Then you'll end up with something like this...

http://www.youtube.com/watch?v=nOLXw5qmqfE

Weeee!!!

[B6Lovin]

^i don't get it....

[jaysonlosado]

Nah, she's too conservative...she "likes her car the way it is"...but yet she loves my S4 with its mods...so I think in due time, I will inherit hers too..but for now, I need to replace all the stock stuff..so anyone with some spare check valves they don't need?

Thanks!

[zims666]

..so anyone with some spare check valves they don't need?
Thanks!

yea, ask these guys or those guys

[hessank]

AudiA4 20T wrote "sorry to be annoying but that thing in the back is actually the "leak detection pump" (#11)" and later "can someone answer me why capt. obvious and Shawn dont have the drivers side thing... can u just pull that shit out with no CEL? And I guess I have to take off my fender liner?"
I also have this Leak Detection Pump. Is this taken out too? I was told by dealer that mine needs replacement and I would prefer to perform this mod than replace. Please and thanks for answering. hessank



Can someone answer this

[jaysonlosado]

thanks zims666...I know the prices, cheapest I found being ECS Tuning at 16.95..but was wondering since it seems so many people have removed their check valves, that if they still have them laying around, I could help "clean out the shop" so to speak. If not, I'll just buy them brand new...not a big deal.

[widgget]

OK, so i'm gonna order one of those block plates from Intergrated Enginnerring and noticed they have a "SAI Resistor" that makes the ECU think the SAI is still there.

if i get this will i still pass all the readiness tests or will i still fail one?

http://forums.vwvortex.com/zerothrea...ostid=37860406

noone ever answered my question....

[A4ringedONE8T]

OK, so i'm gonna order one of those block plates from Intergrated Enginnerring and noticed they have a "SAI Resistor" that makes the ECU think the SAI is still there.

if i get this will i still pass all the readiness tests or will i still fail one?

http://forums.vwvortex.com/zerothrea...ostid=37860406

You do not need a resistor for the pump, it doesnt do anything. Just leave it unplugged. You will not get a CEL from unplugging the SAI pump, only from the lack of flow of removing it. The ONLY codes from the SAI delete will read "SAI-incorrect flow detected." There is not a hardware fix for it and no resistor will clear/remove the code. The only fix is to have the systems check removed through the software. Readiness for SAI will be set to failed.

[A4ringedONE8T]

bumping this for some help.
after completing I got a cel for p0444, duh forgot to plug the evap solenoid back in. plugged it in, ran it for a bit and was fine, now its throwing a p0441, for possible incorrect flow I believe it said. Is this not still for the evap system? I was under the impression that I would get a cel for the removed SAI, but not for evap? or am i wrong and p0441 can ALSO be SAI system? thanks in advance guys!

Im not sure of the P code but you should not get a flow code from removing the EVAP lines from the purge valve to the IM and TIP, as long as the valve is still connected to the feed line from the tank and plugged into the harness. The incorrect flow code your seeing is most likely from SAI and is entitled "SAI-Incorrect Flow Detected"

[A4ringedONE8T]

Anybody ever done this to a 2.0T FSI motor? Just curious if there are any links out there for a DIY on one...

The FSI is very, very different and no where near the amount of crap as the 1.8T. I would leave everything alone, we've done a few 3071R GTI's and I did not remove any part of their vac system

[A4ringedONE8T]

AudiA4 20T wrote "sorry to be annoying but that thing in the back is actually the "leak detection pump" (#11)" and later "can someone answer me why capt. obvious and Shawn dont have the drivers side thing... can u just pull that shit out with no CEL? And I guess I have to take off my fender liner?"
I also have this Leak Detection Pump. Is this taken out too? I was told by dealer that mine needs replacement and I would prefer to perform this mod than replace. Please and thanks for answering. hessank

Can someone answer this

The line that runs from the tank to the purge solenoid on the pass side of the car needs to stay. The valve also needs to stay connected to that feed line and plugged into the harness. Everything after that purge valve can be removed. The easiest to clean up the engine bay is to remove the two lines which feed the charcoal canister on the drivers side, there are two quick disconnects for those lines underneath the power steering fluid resevoir. You can unclip them there, leave whats in the fenderwell untouched, and remove everything in the engine bay, or if you want to, pull the fenderwell out and remove the pieces there too. It is minimal weight, no more than a lb, I wouldnt bother with it unless you just want to. You do not see the purge valve in my pictures because I moved it into the pass side fenderwell behind the fenderwell liner. It is still there, connected to the feedline from the tank and still plugged into the main wiring harness.

[widgget]

alright, thanks.
i guess i'll hold off ordering the block plate until i can verify that new hampshire doesn't require 100% readiness to pass inspection. taking all the lines out doesn't seem that bad of a job.... but i sure as hell don't want to attempt putting it all back in.

[widgget]

To pass NH state inspection it looks like the SAI is required. :( guess i'll just replace the check valves and keep hunting for my leak.


Saf-C 3220.02 Air Injection Pump/Pulse Air System.

(a) The air injection pump/pulse air system shall be required on all vehicles less than 20 model years old, if so equipped at the time of manufacture.

(b) A vehicle shall be rejected if:
(1) The air injection pump/pulse air system is missing;
(2) It is plainly obvious that the air injection pump/pulse air system does not function; or
(3) Any hoses associated with the air injection pump/pulse air system are missing or do not function.




Saf-C 3220.04 Evaporative Canister.

(a) An evaporative canister shall be required on all vehicles less than 20 model years old, if so equipped at the time of manufacture.

(b) A vehicle shall be rejected if:
(1) The evaporative canister is missing;
(2) It is plainly obvious that the evaporative canister does not function; or
(3) Any hoses, wires or cables associated with the evaporative canister are missing or do not function.

[hessank]

Thank you A4R---8T. I can't wait to remove all that crap too. So far I believe I have all the info, pics and flow diagrams for a successful transformation.

[nihil]

I've been reading this thread every couple weeks, and so far the only thing that has kept me from yanking all that crap out of my engine bay is the SAI CEL issue. The ECU has to get input from something to determine if SAI is operating correctly. I'd like to address this outside of the ECU firmware, as not everybody is in a position to go that route.

I'm guessing this is not the case, but a resistor should work to convince the ECU that the blower motor is still in place (if it's using that as input). Otherwise it needs to rely on a sensor, or combination of data from other sensors, to trigger that CEL/code. What is the input that the ECU is using for the SAI system?

[A4ringedONE8T]

When the car is cold started, the ECU triggers the secondary air pump to turn on, the ECU then monitors for a change in A/F as it should lean the car out to warm up the car and cat quicker. If there is no additional unmetered flow introduced into the motor then the car will not lean out and it will throw a "SAI incorrect flow detected" code

Putting a resistor on the pump does nothing, you will not get a CEL relating to the pump itself being unplugged

[Spinnetti]

sooooo....... when you are on boost, you are pressurizing your brake booster aren't you? isn't that what some of the check valves are for?

[A4ringedONE8T]

There is a check valve on the brake booster itself, so no you're not. Audi likes to double things up if you haven't already figured that out

[nihil]

So something that sits between the pre-cat O2 sensor and the ECU, monitors the SAI pump input and ECT, and spoofs a lean reading until it reaches normal temp should work then. Do you know the deviance from actual lambda the ECU requires to prevent the incorrect SAI flow trigger?

[tketke]

Would it be possible for anyone or jet jockey to post on how to set up a catch can after this mod???

[tketke]

Another question too. I know these are noob question, but Will the engine still function correctly if I got rid of the sai but left the n80 valve connected to the tip and intake mani? Basically, just getting rid of the sai pump and adding a oil catch can was my goal. I wanted to keep the evap with a direct line and one check valve into the IM.

[phoenixr2]

Im not sure of the P code but you should not get a flow code from removing the EVAP lines from the purge valve to the IM and TIP, as long as the valve is still connected to the feed line from the tank and plugged into the harness. The incorrect flow code your seeing is most likely from SAI and is entitled "SAI-Incorrect Flow Detected"

so, short of re-installing everything, how do I get the light to go out. you mentioned "programming." Is this like APRs stage one with code delete? or more specific programming? what about resistors in place of the SAI pump? will any of the flashes have the option of getting it turned off? what do I do

[nihil]

so, short of re-installing everything, how do I get the light to go out. you mentioned "programming." Is this like APRs stage one with code delete? or more specific programming? what about resistors in place of the SAI pump? will any of the flashes have the option of getting it turned off? what do I do

Resistor will not work. If you read several posts back, it appears that the ECU is triggering the SAI flow CEL because it's not detecting a lean condition after it activates the SAI pump. You'll either have to do it in ECU programming, or modify the pre-cat O2 sensor signal based on the ECU output to the SAI pump and I'm guessing ECT sensor.

[downhillracer]

I would not remove the PCV system as this will no longer remove the oil mist and blow by gasses from the crank case and will cause sludgeing in the end!

[absolutegtr]

I would not remove the PCV system as this will no longer remove the oil mist and blow by gasses from the crank case and will cause sludgeing in the end!

Not necessarily. I just have mine dumping to the bottom of the transmission.....but I will eventually have it hooked up to the downpipe (exhaust) were it will creat a continuous vacuum on the crankcase and head.

For those worrying about getting a CEL from all the junk....get in contact with AZ member "k0mpressed" (or something like that) I believe he has away to set all codes to pass and whatnot

[widgget]

For those worrying about getting a CEL from all the junk....get in contact with AZ member "k0mpressed" (or something like that) I believe he has away to set all codes to pass and whatnot

That doesn't help in states where the SAI is required to pass inspection if it was fitted on the car at the mfg. they will see all the shit missing and will fail it, if the computer passes or not.