ecu swap - boost problems

Chewy4000 at Chewy4000 at
Fri Jun 14 10:53:40 EDT 2002

In a message dated Fri, 14 Jun 2002  9:49:06 AM Eastern Daylight Time, brett at writes:

> At 5:38 PM -0600 6/13/02, Charles Baer wrote:
> >I found an eye-hole in the little shorty hose that connects the
> >crankcase pressure valve to the intake system.
> The crankcase hose that runs from the 90 degree valve down to near
> the turbo?  Hmm.
> >   Up to 10 lbs
> >nothing, then all hell breaks loose and it blows open to dump all
> >of the pressure.
> If that was the problem, I'd have all sorts of stumbling, I would
> think.  This is almost 100% smooth; boost doesn't build very slowly,
> but once power finishes building, it's very smooth.
> I could swear I heard the ECU hose going "PSSSSSSSH!" under boost
> last night...I'm convinced it is a decent sized vacuum leak and it'll
> be fixed this weekend provided I find the proper size replacement
> hose.  If it isn't messing up the gauge readings/ECU
> pressure sensor,
> it is causing a metered air leak and should be fixed anyway.
> Brett
> --
> ----
> "They that give up essential liberty to obtain temporary
> safety deserve neither liberty nor safety." - Ben Franklin
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I had a hole that I could fit 3 fingers in the crankcase breather hose, but this had no effect whatsoever on the boost highs or smoothness.
I changed it hoping this may help something in the car, but nothing changed.
The car ran the same with our without the new hose.


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