[s-cars] Boost problem HELP!

JR anon at magnaspeed.net
Thu Nov 20 11:46:45 EST 2003

It wouldn't surprise me it it's getting excessive boost because when it
is working, if it wasn't for the head rest, my head would rip off and
land in the back seat for that first 30 seconds when it's working.  :-P

I know it's not the hose AT the ECU because I tore that up twice now to
make sure I put it back on right when I reinstalled the ECU after it
came back from being upgraded.  So I can find this hose under the hood
or under the carpet/kick panels?  Is it green like it is at the ECU?


On Mon, 2003-06-09 at 11:11, Robert Pastore wrote:
> It sounds like you are getting excessive boost, and then the ECU is
> tripping into limp home mode.  This could happen if the MAP sensor
> inside the ECU is defective (not likely) or isn't seeing the boost.
> I would suspect the boost hose that leads to the ECU has come apart at
> the moisture trap under the black plastic cover at the rear of the
> engine bay.
> Bob
> -----Original Message-----
> From: JR [mailto:anon at magnaspeed.net]
> Sent: Monday, June 09, 2003 11:09 AM
> To: s-car-list at audifans.com
> Subject: [s-cars] Boost problem HELP!
> I have a weird boost problem.  I have a 93 S4 with an MTM Stage 1 chip
> (just got it).  When I first start the car it takes off like a bat out
> of hell.  About 30 seconds later the power is gone.  It feels like the
> turbo is barely working if at all.  I stop the car, turn it off
> (reboot
> the computer?), and start it again.  Boost is back on and it pulls
> hard
> again for another 30 seconds or so.  Then back to no boost mode.
> Every
> time I start or restart the car I have the boost again, but for less
> than a minute.  I've replaced the bypass valve and visually inspected
> the hoses without removing them (not that this does much good).  Does
> anyone have any idea what is going on?  I'd appreciate it if someone
> could point me in the right direction.
> Thanks,
> JR
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