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

[Dopefish]

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.

Then don't remove it? That is a silly statement to be making here.

[absolutegtr]

Then don't remove it? That is a silly statement to be making here.

LOL for realz

[widgget]

LOL for realz

i only say that because my worry was having a CEL and not passing inspection, i never thought about them failing it because the part was physically removed.

The reason i want to remove all the extra lines is to reduce the area a boost leak is possible to occur. if i can leave the SAI in place and make it "look like it's all hooked up", have the ECU pass all readiness tests, and not throw any CELs then i might be back on board with this. I just don't want to end up with a car that isn't road legal come next march when i need to inspect it again.

[absolutegtr]

/\ I understand.

Living here in South carolina, we can run open headers if we want

(referring to V8's, lol)

[B6Lovin]

i only say that because my worry was having a CEL and not passing inspection, i never thought about them failing it because the part was physically removed.

The reason i want to remove all the extra lines is to reduce the area a boost leak is possible to occur. if i can leave the SAI in place and make it "look like it's all hooked up", have the ECU pass all readiness tests, and not throw any CELs then i might be back on board with this. I just don't want to end up with a car that isn't road legal come next march when i need to inspect it again.

well take it somewhere that they won't pop your hood. don't you have ANY friends who inspect? or maybe friend of friends?

guess maybe im just lucky down here... but i've got 5 friends who inspect, and a place where i don't know anyone but they still don't pop my hood.

[widgget]

there are some shops but the state is cracking down on them.
i HATE the "is it gonna pass?, is it gonna pass?, is it gonna pass?" shit when i have to get my cars inspected, i like to avoid stress.

[Spinnetti]

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

Don't need a catch can...
I just put a K&N breather on the back of the head off the rubber hose that connects the block and head breathers. After a year of running a BT, its not even damp (25+ psi).

[rtb98]

this no cell mod suck.

you will get a CEL ...

i do exactly every thing like explained with out toutching the SAI and i got a CEL

i will need to borrow a vag com cable and see what is it.

[Molotov]

well I just don't know, maybe your car hates you. I've had this done 2 months ago and haven't received a CEL, MIL, or thrown a code related to anything I've removed.

[tketke]

I havent completed the job yet. All I have done is take out the n249, but I can say it is completely simple once you open the hood and look at the systems. The diagrams help, but once you look at it in person you wont have any questions

[tibanez]

Hey, what turbo, maf and intake do you have. Looks good I like the way it fits.

My setup gt28, maf and intake is all F uped. I had to place the filter downward, which is very hard to reach.

[tibanez]

hey, can I call you with some questions? I am in South America

thanks
Tony

[dfaudi]

How is idle after doing this mod?

The ecu calculates idle factoring in all the incoming air from the vacuum lines attached to the manifold.
Im interested in idle rpm and timing at rpm.
Can someone take some logs of block 2 and 11 at idle?

Reason is that i have an issue with slightly higher idle (900rpm) and timing is 8 degrees ATDC. Ive tried everything to find the vac leak/problem and debating whether to rip out all the vacuum lines and do this mod.

[BOPOH]

mine does just fine, and we found a huge hole in one of the pipes plus all of my check valves were burned. Bottom line im extremely glad that Sami did it to my car!!

[Capt. Obvious]

Back from Purgatory...

So, earlier in the thread there was a discussion about CELs from removing the SAI pump... why won't adding a resistor prevent this? What does the ECU look for to determine "correct SAI flow"?

BTW, I have a seriously gutted engine bay now, I'll get pics soon.

[Molotov]

I got the SAI codes maybe once or twice in the first week, then absolutely none for the past couple months... that doesn't answer your question at all, but try clearing it for a while and maybe your problem will go away haha. I didn't bother with a resistor

[A4ringedONE8T]

Back from Purgatory...

So, earlier in the thread there was a discussion about CELs from removing the SAI pump... why won't adding a resistor prevent this? What does the ECU look for to determine "correct SAI flow"?

BTW, I have a seriously gutted engine bay now, I'll get pics soon.

One of the tasks of the wideband 02 sensor is to monitor an A/F change when the SAI pump turns on then off after the car is to temp. The only way to keep the light off is to #1: have the flow inorder for the wideband and ECU to monitor that A/F change, or #2: remove the systems check from the ECU

No resistor or anything else will allow the ECU to see the A/F change that it expects and has programmed in to check for without either the SAI flow present or removing the thought of even checking for it from the ECU

[A4ringedONE8T]

How is idle after doing this mod?

The ecu calculates idle factoring in all the incoming air from the vacuum lines attached to the manifold.
Im interested in idle rpm and timing at rpm.
Can someone take some logs of block 2 and 11 at idle?

Reason is that i have an issue with slightly higher idle (900rpm) and timing is 8 degrees ATDC. Ive tried everything to find the vac leak/problem and debating whether to rip out all the vacuum lines and do this mod.

Its still a given metered amount of air through the MAF, it doesnt matter what path or paths it does or doesnt take. Its a given amount of air that enters the MAF, moves through the engine, and then is verified via the wideband 02 sensor on its way out

A high idle is typically due to either a bad or dirty throttle body. You should also do a TB alignment and see if that helps

[A4ringedONE8T]

this no cell mod suck.

you will get a CEL ...

i do exactly every thing like explained with out toutching the SAI and i got a CEL

i will need to borrow a vag com cable and see what is it.

The N112 will have to remain connected via the electric harness and a vac line to the SAI valve on the back of the head as well as a vac feed line from the intake manifold, you left them connected correct? N249 needs to stay plugged into the harness as well, with no vac lines connected

[Capt. Obvious]

One of the tasks of the wideband 02 sensor is to monitor an A/F change when the SAI pump turns on then off after the car is to temp. The only way to keep the light off is to #1: have the flow inorder for the wideband and ECU to monitor that A/F change, or #2: remove the systems check from the ECU

I had a feeling that was the reason behind it.

Does/can REVO's BT software remove that system check, or will I have to do it via VAG-COM?

[A4ringedONE8T]

I had a feeling that was the reason behind it.

Does/can REVO's BT software remove that system check, or will I have to do it via VAG-COM?

REVO's newly updated stg 3 files have SAI codes removed yes. It is not something that can be done with vagcom, only by the software tuners as part of the software

[tibanez]

I have eliminated the secondary air pump since my head does not have egr. But what should I do with the opening at the back of the valve cover. The T that goes down to the side of the block. But where should the other side of the T go to?

[Molotov]

either a catch can or dump to the ground

[tibanez]

is this what I am looking for?

http://www.atpturbo.com/Merchant2/me...egory_Code=BCS

it should vent out or in?

[dougyfresh]

REVO's newly updated stg 3 files have SAI codes removed yes. It is not something that can be done with vagcom, only by the software tuners as part of the software

There is a lot more than just setting readiness to 'pass' and having the ECU ignore the 'insufficient flow'

There are a few maps within the ECU that need to be changed in order for a smooth idle when the SAI is 'supposed to' kick in. Within those maps you have to also turn the timer down to the smallest value possible (1sec if I recall correctly). I am guessing they are taking care of that too...

[A4ringedONE8T]

There is a lot more than just setting readiness to 'pass' and having the ECU ignore the 'insufficient flow'

There are a few maps within the ECU that need to be changed in order for a smooth idle when the SAI is 'supposed to' kick in. Within those maps you have to also turn the timer down to the smallest value possible (1sec if I recall correctly). I am guessing they are taking care of that too...

I understand that, I never said anything about it being something simple

[Capt. Obvious]

I've been busy this weekend...

[7speed]

I've been busy this weekend...

finished product pics or BAN

[Capt. Obvious]

finished product pics or BAN

It's dark, I'll get some when there's daylight.

[absolutegtr]

tell me it doesn't feel good to get rid of all that junk....

[Capt. Obvious]

Yeah, it looks really good. The check engine light from removing the SAI is annoying though. I might put it back in for now, I doubt it though. LOL

[7speed]

I got rid of all that stuff and it still looks crappy ! I need to do a wire tuck and hide some of that ish

[dougyfresh]

I've been busy this weekend...

How does your engine run without the timing belt and water pump?

[7speed]

hahahaha

[Capt. Obvious]

How does your engine run without the timing belt and water pump?

It runs great now that the new ones are in there.

Here's what the engine looks like now:


(Looks like a nice place for a big turbo, huh?)

[aaaudiprotein]

It runs great now that the new ones are in there.

Here's what the engine looks like now:


(Looks like a nice place for a big turbo, huh?)

Where is your filter?

[Capt. Obvious]

Where is your filter?

I don't use one.

[Capt. Obvious]

Okay, I lied.

[BOPOH]

why dont you paint your "1.8 TURBO" with white paint marker? i did mine with sharpy and still holds pretty good
by the way its my OLD picture, now it looks alot like urs

[Turbo1A4]

Here's what the engine looks like now:


(Looks like a nice place for a big turbo, huh?) [/QUOTE]

where did you get that cover for the far right side?? sorry to get off topic