[s-cars] Hesitation at 3,500 rpm WOT - bad BPV?

[JC]

Funny you mention it... I'm chasing an exactly same symptoms.  Car pulls
like a damn train at partial throttle, main stumble is right in that 3-4k
area under WOT.  might get a little stumble again at full WOT and high RPM
but not as bad. Car is making a solid 1.7bar at full bore on the aftermarket
boost gauge and for a while it was quite happy about that, no other major
changes in the time it started acting up.

MAF connection and MAF cleaned to no avail, but I just borrowed a known good
MAF that I'll be tossing in quickly next weekend to see if that helps.  I
started to make a deluxe boost leak tool at one point with a schrader valve
and a pressure gauge on it but never got it completed, this might be the
impetus...

> Nathan,
>
> It sounds like the exact same issue I had for about a year
> until it finally popped code 2224 and I found my answer.
> Essentially your ECU is being tricked believing you are
> overboosting, and wen that happens it momentarialy shuts off
> the fuel pump.
> I bet you either have a boost leak, defective MAF or dirty
> MAF connections at the cable
>
> Read here:
> http://www.sjmautotechnik.com/trouble_shooting/20vboost.html#oboost
>
> HTH
> Chris
>


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