wakko
11-09-2004, 04:28 PM
I posted before regarding a software limp problem. (can follow this link for additional info: <a href="http://forums.audiworld.com/a4/msgs/2194248.phtml"> here </a>)
since then I put back my stock chip just to see if the ECU will do some weird stuff and the VAG WOT on 3rd TIP gear shows good normal graph result
Here is a graph of the two different runs GIAC vs. stock
<img src="http://webfiles.uci.edu/wongss/picture/vag.jpg">
To me, it doesn't seem to be a boost leak, since I was holding boost quite well w/ 15-16 psi until the higher rpm. But once I break the 4600rpm barrier, it starts to drop off and then throw the limp mode code.
Some suggested its a sign of dying turbo, if thats the case, would there be any other way I can check such as certain vag blocks...etc; there is also no excessive turbo noise either.
since then I put back my stock chip just to see if the ECU will do some weird stuff and the VAG WOT on 3rd TIP gear shows good normal graph result
Here is a graph of the two different runs GIAC vs. stock
<img src="http://webfiles.uci.edu/wongss/picture/vag.jpg">
To me, it doesn't seem to be a boost leak, since I was holding boost quite well w/ 15-16 psi until the higher rpm. But once I break the 4600rpm barrier, it starts to drop off and then throw the limp mode code.
Some suggested its a sign of dying turbo, if thats the case, would there be any other way I can check such as certain vag blocks...etc; there is also no excessive turbo noise either.