I have an Audi a4, 1.8t. I got it chipped about a year ago and it runs great. I was working on it today, nothing major, but I had the BOV and air intake hose off the car. I have been pushing like 15 lbs of boost, when I got everything back together, I took for ride and I am only pushing like 4 lbs of boost now. I double checked all, and it is put back the same way. Does anyone know what it could be. Please help, this is driving me crazy.

 

lose hose or maybe some sort of vacuum leak?

looks like ur in limp mode buddy

 

if everything is hooked up the same way, your going to need to unplug your battery for about 10mins and it should be ready to go.

 

I called audi and they said that it might be the wastegate stuck open, would that happen? I was fooling with the BOV then put back together. If it is the wastegate, how do I check????
The boost gauge seems like it's reading ok, if there was leak wouldn't I notice in gauge????

 

If I unplug battery, would it set off any codes in dash that will have to be reset??

 

maybea radio code. Other than that, nope.

 

It's worth a try, Thank you.

If anyone else has any advice, please let me know.

 

Check the connection to the N75 valve.
Make sure it's connected.
If it is connected, check the wires going into the connectorfor breakage. They are prone to breaking at the back of the connector under the rubber boot.

Also, scan for codes. If you are in limp mode you should have a code stored.

 

I want to thank everyone that left a post, didn't have a chance to look at again, getting ready to look at now. Hope something works....

 

yeah re-set the battery see if it takes you out of limp mode. if not try to re-check everything you did. mine did this once and i thought for sure it was limp mode, but it turned out to be a fualty n75-h that i had just put on a few days before