Stage 3 to stage 0 is zzzzzz

[flyfishing]

I swapped out my ECU with a stock one to see if my ECU has suspected damage to it. ~20 lbs of boost to 5 lbs sucks! Amazing how slow it was stock.

[f4m0u5]

I know what ur tlaking about some what lol i go from my stage 2 tune (18 psi) back to stock tune here and there becuas i like to drive daily on stock tune to save turbos lol

But when ever i go from stage 2 back to stock tune im always stuck saying wtff next time i go to get on highway lol

[Smitty2A4]

I went though the same thing, stage 3 to stock due to being flagged for emissions in MA. Stock the car is a total dog, I have a hard time believing it runs low 14s, feels more like a 15 second car to me.

[MikeyB3]

5psi would make the car feel like a massive dog. IIRC, stock boost is 8, yeah?

APRs valet mode... now that's a dog. (Thank you APR, for saving my car from valets)

[redline380]

Guessing it is a feeling close to when I blow a charge pipe on my 2871r A4. It is a tough ride home with about 120hp, down from 400hp

[mikeb17]

I went from a stripped b5 s4 with rs6 rs to a completely stock s4. When I say stripped I mean stripped too haha. No AC, dash, radio, missing fender, bumper, hood, one seat, no interior, no spare. Timing belt snapped at 135. RIP my junkyard hibiscus 😭.

[flyfishing]

Well I haven't floored my car yet so I only see 5 lbs boost. Maybe 8 is stock I don't know. Right now it is a dog (but much better gas mileage!).

I'm just gonna run this a week to see if I get CEL. If not, I know my answer and I send ECUs off to GIAC for transfer of tune.

[mikeb17]

What keeps my gas mileage in check is a manual boost controller 😂

[AudiTechS4]

How were you stg 3 and just stuck a stock ecu in . its got to be running like doodoo unless you swapped injectors and maf

[flyfishing]

you know what, it runs surprisingly well. i got a stock ecu same part number and stuck it in and it's been running fine. i've had a bunch of parts replaced on my car and the only thing they can think of is a damaged ECU b/c of coolant leak migrating up the wiring harness to ECU -- they did see gunk/corrosion at the connectors hence new ECU to try.

[Meow]

I hope you aren't driving around on big injectors with a stock tune for small injectors dumping fuel and maxing out your correction fuel trims, washing out your rings and destroying your motor...

Good luck!

[flyfishing]

I have awe stage 3 kit. I will put the old ecu back on just in case

[f4m0u5]

I wonder what the fuel trims are at and im suprised no codes. Possibly because bigger maf almost equals out injectors?

[flyfishing]

I put my old ECU in. runs much rougher than stock ECU. i must have damaged ECU. time to send to GIAC.

[bigern45]

I put my old ECU in. runs much rougher than stock ECU. i must have damaged ECU. time to send to GIAC.

or, you have a boost leak that is apparent @ over 5,6, or 7 psi..
vagcom first and pull codes please, you've just gone in the complete opposite direction as to what a proper diagnosis should..

[getslideways]

I put my old ECU in. runs much rougher than stock ECU. i must have damaged ECU. time to send to GIAC.

What size MAF and injectors are you using, because this makes very little sense why the software for a stock setup would work seamlessly with the hardware from a true stage 3 setup.