graviTT

The day after running out of gas (cluster's going bad, gave me conflicted values and I paid for it..) and needing AAA assistance to bring me a gallon of gas, it looks like I'm running at only 5 psi of boost. Funny, I just got my 40k service with spark plugs, etc. this week, and a new and totally functional MAF installed 4k ago.. I haven't gotten a CEL yet, and my MAF shouldn't be bad, and there doesn't seem to be a boost leak (after a cursory look at the engine bay). I don't think cleaning the MAF would do anything either.. any recommendations? Would resetting the ECU do anything? (What does that mean, btw?)

Everything was working perfectly prior to this "running out of gas" situation, just no boost over 5 psi. FYI I have a GIAC X+ chip, boost machine, boost gauge, etc.

MCPaudiTT - DEFCON 1

5 psi is a software limp mode. VAG it for a code and report back.

graviTT

I'm going to visit the tech tomorrow morning, glad to know my west coast buddy is still hanging out on AW at this hour. I'll let you know what happens. Btw, would a ECU reset be a possibility, and how is that done?

Lowcountry

but it obviously won't fix whatever put you into limp mode. To reset ECU, disconnect the negative terminal on your battery for about 10 minutes or so. Make sure that you have your radio code before you do so, because when you juice back up again your radio will be in safe mode. If you don't have your owners manual, you can likely find the code written on a sticker in your spare-tire well. Hope this helps.

TTschwing

If either unplugged or if the harness is broken (sorta common) the car will default to a steady 5-6 psi..

Something made it happen. If a reset won't make it go away, check the stuff I mentioned..

MCPaudiTT - DEFCON 1

car, let the clutch back out, and I was good to go. In other words, turning the car off and back on was enough to reset my soft limp. Not sure if that's always the case or not.

graviTT

After seeing my tech (Euro Tech Motors in West LA), we VAG-ed the TT and found realized it thrown a lean code. It was cleared, I believe, without resetting the ECU, and now the car runs at normal boost. Awesome. Thanks for the support.

MCPaudiTT - DEFCON 1

so it will come back. If it is serious, you could be causing damage by "ignoring" it with a reset - this assumes you didn't fix anything, of course.

If you post the code, we may be able to figure out what the problem is. My guess is, with a lean code, it is your MAF. You don't want to run your car lean for too long - it's not good for the motor.