2002 S3 over boost issues

[Redline1984]

Hello guys,

My first post, and sadly one really needing some help! Bought my 2002 BAM 225 S3 in mid-July, with 50k miles on and full service history.

However couple of days after I got it, noticed it wasn't running right and was losing power/going into limp mode. Plugged it into VAG-com and got the 17963 - Charge Pressure: Maximum Limit Exceeded error.

Took it back to the car dealer I bought it from. They've fitted a replacement turbo and a new MAF. They've now passed it onto an Audi dealership who are apparently hugely confused by the cause of the problem having done various diagnostics on it.

So.....does anybody have any idea as to what might be causing it to over-boost? Or am I just best off getting my money back?!

Cheers

 

[Essflee]

Sorry to hear about your problems, i've had exactly the same issues with my car, 2002 BAM as well......

Is your car remapped or not ? i had a remap put on the car (mentioning no names) the map itself was causing the car to go into limp mode with hardly any power at all.... i was getting exactly the same code up as your getting, i know my mate has had the code come up on his S3 a few times too but wasn't as often as i was experiencing it, apparently it's a safe guard for the Turbo to stop it boosting to much save and cause any damage. However i took my car to Jabba to have one of their maps put on the car and it's been good as gold ever since (touch wood).....If you hunt through the threads you'll see theirs quite a few people have similar problems too....their are various possibilites, but that's the one that worked for me........

 

[Redline1984]

Yeah the possibility of it being remapped has been mentioned, but there's no evidence other than those who have driven it being described as "very quick for an S3". Although as various remaps aren't detectable by dealer software I'm guessing they wouldn't be able to tell anyway.

Various hoses, the MAF sensor, the N75 have all been changed without making any difference, so it leaves very little else I suppose.

Just very annoying!

 

[Essflee]

I don't know where your based but if changing the parts mentioned hasn't cured it then i would guess at the map, and that is a guess....if you get to your wits end then i'd take it to jabba, i'm near enough 100% sure he'll sort it out for you.......when i took mine i was told the turbo was boosting at silly pressures causing it to shut down....get a custom map for your car !

 

[Redline1984]

Well another week and still seems to be no progress.

Audi dealership replaced the MAP sensor, claimed it was fixed but it's made no difference so it's back with them again.

Option of it having a dodgy remap have been ruled out, so I'm getting close to my wits end as to possible causes, as no one else seems to know either!

 

[Essflee]

Who ruled out a dodgy map ??
I was told that my previous map was not at fault when it was....i'm no expert at all but i'd say it's hard to tell if the map is any good or not, the car is overboosting for some reason, and if it is the map then i dare say it would difficult for even audi themselves to see what the problem is....the'll keep changing various parts which is going to tally up !!

How often does this limp mode happen, could be worth getting a REVO map, one of the free ones that only lasts a few hours and see if the situation improves.....

 

[Redline1984]

Both Audi and the garage who worked on it originally decided there wasn't a dodgy remap. I think the original garage went so far as to specifically getting some specialist to come check the ECU.

As for when it happens, from memory (I havent driven the thing for 4 weeks) its pretty much every time you accelerate from around 2-2500rpm in a high gear. It accelerates slightly, then stutters and loses power.

To be honest having had this much trouble with it so early in my ownership of it, I'm very tempted to just ask for my money back and buy another. I fear I'd always be waiting for something to go wrong again.