1990 10vt avant - falls on its face at 4k rpm

[LL - NY]

Check your lower IC hose (usually not noticed) or (more obvious) the
Michelin Man hose. Also check your IC for leaks under boost.

HTH,

LL - NY

On Sat, Feb 21, 2009 at 2:39 PM, Bares, Vittorio
<Vittorio.Bares at nuance.com>wrote:

> Hi - I've been chasing this for some time...
>
>
>
> Have a chip and 1.8bar wastegate spring, with recirc valve.
>
>
>
> Boost gets to 1.8 (according to dash computer), sometimes over-boosts to
> 2.0 (and usually cuts out completely there).
>
>
>
> Changed in the past 6months or so:
>
> *       Plugs/wires
>
> *       Rotor/Cap
>
> *       Injectors
>
> *       TPS
>
> *       Fuel Filter
>
> *       Fuel Pump
>
>
>
> Symptoms:
>
> *       slightly lumpy power getting to 4k rpms - but once there, motor
> just falls on its face and won't get any higher.
>
> *       Lumpy power can be smoothed out if you keep the gas pedal at mid
> range - but again, falls flat around 4k (although sometimes it will be
> ok to a little more than that.
>
> *       When the car is cold, it will run to about 5k-5.5k without
> bogging - power is also much smoother.
>
> *       Temp gauge is pretty consistent and looks accurate.
>
> *       Warm weather, its all much worse - winter weather is better, but
> still not good.
>
>
>
> Possibly multi-function temp sensor?
>
>
>
> I'm figuring this is not a boost leak since I'm getting plenty of boost
> - however, I think the over boost is an indication of something else
> going wrong?
>
>
>
> Could it be the coil going bad at high RPM?
>
>
>
> Pretty miffed at this point on how to get to the bottom of the issue.
>
>
>
> Vittorio -
>
>
>
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