[s-cars] Violent Deceleration Under WOT

[Richard Tanimura]

Dave has certainly identified a common culprit. But the leak can be
anywhere in the boost tract. I have seen bad seals to/from the IC, bad
seal at the TB, rotten hoses.

The root cause of the problem is a leak somewhere in the boost tract
south of (i.e. down stream of) the MAF. The CPU expects to see good
pressure from the MAP when it sees good flow from the MAF. When it
doesn't see both, it kills the fuel.

The symptom is abrupt loss of power.

On 2/5/06, Dave Forgie <forgied at direct.ca> wrote:
> Tim:  It may well be the MAF but I believe you have described the
> symptoms of a split "michelin man" cross-over to intercooler hose.  The
> split will be in a valley of the corrugations (due to an accumulation of
> oil and rotting of the rubber).  Under low boost pressures, the split
> does not open up. However, as you push the throttle down, the split
> opens up and releases all the boost, severely slowing the acceleration
> of the car.
>
> You need to remove the belly pan and the remove and inspect the MM
> hose.  Bend it a bit until you can see the splits.  I am quite sure you
> will find them.
>
> If not, try the MAF connections as suggested.
>
> Dave F.
>
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