[s-cars] Was Bucking Now: Boost is Back!

[Scott Munger]

Chad, et al,
I pulled the ECU and checked the boost line.  Dubious that only one hose
clamp was there (the one closest to the ECU was missing),  still, even
without the clamp, it was quite lodged onto the ECU and a "breath" test
didn't reveal any leaks (although can you break the pressure sensor w/your
mouth??).

I checked the Michelin man hose and it looked good (I have a silicone).

I pulled the "shroud" and looked at the moisture trap and one of the vac
lines was off.  In fact, it appears the previous owner had used electrical
tape in an effort to keep it on.  I clamped the clamp a good degree tighter
and went for a drive.  I flogged the motor in 1st, 2nd, and 3rd and alas,
the boost has returned!  This was it!  Upon inspecting the trap after the
drive, the vac hose was a few millimeters from where I secured it so I'm
thinking I'll need a better clamp.

Ran the ECU for codes and got the happy 4444.

One question, I had a small amount of coolant dripping from the tranny bell
housing when the car was on ramps and running.  The dripping seemed to stop
after a bit and my coolant level is normal... I'm not sure where it was
coming from...  was it because I was on ramps?

Thanks to all for the help!

--Scott Munger
'93 S4


> -----Original Message-----
> From: Chad Clark [mailto:chadclark at qwest.net]
> Sent: Tuesday, November 12, 2002 7:50 PM
> To: mungerts at uneedspeed.net
> Subject: Re: [s-cars] Please Help - Car bucking under WOT
>
>
> Scott,
>   Check the moisture trap under the black plastic shroud on
> the firewall.
> Use a flat head screwdriver to remove the black shroud, then
> look for the
> moisture trap. It's a round cylindrical trap for moisture
> with a vacuum line
> going into it and out of it. If one vacuum line has slipped
> off(usually the
> case) you will get limited boost pressure as you have
> described. Good luck,
>
> Chad Clark
>
> on 11/12/02 7:26 AM, Scott Munger at mungerts at uneedspeed.net wrote:
>
> >
> > (No ECU mods - stock + exhaust + air filter is all)
> > I'll need to dig deeper and do some troubleshooting, but
> several have
> > suggested the MAF, even some 1.8t'ers.
> > Thanks for the feedback.
> >
> > --Scott Munger
> > '93 S4
> >
> >
> >> -----Original Message-----
> >> From: CaptMagu at aol.com [mailto:CaptMagu at aol.com]
> >> Sent: Monday, November 11, 2002 11:25 PM
> >> To: mungerts at uneedspeed.net; s-car-list at audifans.com
> >> Subject: Re: [s-cars] Please Help - Car bucking under WOT
> >>
> >>
> >> Scott
> >>
> >> Sounds like you ran into the infamous max MAF flow ECU cut. A
> >> quick reset can
> >> be had by turning the ignition off then on. The lower
> >> altitude(4000ft vs home
> >> might have got you). Beware of the steering wheel lock if you
> >> try to remove
> >> your key at speed. You might try a total reset of the ECU to
> >> get your lost
> >> boost back. You didn't mention what engine/ECU mods you have.
> >>
> >> Hap, chillin' on Anini Beach, Maguire
> >>
> >
> >
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> >
>
>