Only when boosting.

 

Did you ask the seller if it was chipped? I mean you would definitely know it if it was chipped by driving it if everything else was ok on your car, but not if you have a boost leak. A stock 1.8t is slow to begin with so it might had been very hard to notice if you had a leak before. If this ecu is chipped it might be boosting harder/louder, but leaking somplace before it gets to the manifold and causing you to have these symptoms. Idk just wild guessing. You are way less likely to get a boost leak fault when you have one with AEB engines.

 

Well i have a AEB engine, i don't have a boost guage so im gonna try and find a diy on how to check if i do have a boost leak.

 

It doesn't seem chipped.
From my impression chips seem to kick in at low rpms but this one the boost kicks in if i floor it just makes noise and hardly increases the power if it doesn't decrease it.

 

When is the last time this car was driven before you noticed the louder turbo? And what's the story on why you are swapping ecus?

 

Yesterday, at 8:53 it was runnig fine.
swapped the ecus drove it at 9:15 and the turbo spooled louder.

I bought this one as a backup to use for when i shipped my ecu to get chipped.
I was just testing it last night.

 

I'd check for a boost leak, definitely. If this ecu is chipped and caused a boost leak or a boost leak you had before to get worse then you might not need to send that other ecu out to get chipped! If the ecu had a engine faults when you put it in for the first time then it may have been running in limp mode (0-4 lbs of boost, scaled down fuel/timing.)

 

Oh ok!.
If it is running on limp mode?
How does it come out of that mode?

 

I think it may be limp mode.
Cause it feels almost as if its misfiring when i punch it.
Turbo sounds pretty normal.

 

Disconnect the battery overnight and when you plug it back in, turn the ignition to ON and leave it there for a minute. Then start. See what happens. You'd more than likely have a cel w/limp mode.