[urq] Help me with my Boost pressure testing methodology

[Ingo Rautenberg]

Yep.  Of course, getting the car to a dyno would be an adventure itself, let alone standing in front of it with an adjustable timing light on the dyno ;-)  

Hopefully will have the "known good" ECU for testing tomorrow :-)
  ----- Original Message ----- 
  From: qshipq at aol.com 
  To: i.rautenberg at waratap.com ; brogers at terrix.com 
  Cc: urq at audifans.com 
  Sent: Friday, March 18, 2005 12:09 PM
  Subject: Re: [urq] Help me with my Boost pressure testing methodology


  Your next step is to replace ECU with known good?  Oh yeah you know that already :)

  This sounds like a bad pressure transducer to me.  It took a while to hear that last part (under load) while doing my favorite urq repairs:  phone diagnostics.  Short of RWKG, you could stand in front of the car on a dyno with an adjustable timing light.  

  Your cat temps are "premature", but glad that new I.R.IR temp gun works.

  Scott Justusson
  QSHIPQ Performance Tuning


   
  -----Original Message-----
  From: Ingo Rautenberg <i.rautenberg at waratap.com>
  To: Brandon Rogers <brogers at terrix.com>
  Cc: urq at audifans.com
  Sent: Fri, 18 Mar 2005 11:50:35 -0500
  Subject: Re: [urq] Help me with my Boost pressure testing methodology


Symptoms are (with no load), once the duty cycle is set and the checks on
it's operation are OK, actual running under load is problematic if not
impossible, though occasionally boost of 13/14 psi can be attained.  If the
car stalls, I cannot restart without  tweaking the mixture a couple of turns
clockwise :-(   I ran a check on the cat temp and at 2000 rpm after warmed
up got surface reading of  450 -475 degrees F at the front and the back of
cat.  When the car dies I will either get what sounds like an intake
backfire or nothing -- and I mean nothing, like someone turned off a switch.
The fuel pump is wired to run with the ignition on.  Fuel system pressures
check out (90 and 55 PSI).


----- Original Message ----- 
From: "Brandon Rogers" <brogers at terrix.com>
To: "Ingo Rautenberg" <i.rautenberg at waratap.com>
Cc: <urq at audifans.com>
Sent: Friday, March 18, 2005 11:27 AM
Subject: Re: [urq] Help me with my Boost pressure testing methodology


> what are the symptoms again?
>
> Brandon
>
> ----- Original Message ----- 
> From: "Ingo Rautenberg" <irautenberg at comcast.net>
> To: <a.sigal at bluewin.ch>
> Cc: <urq at audifans.com>
> Sent: Wednesday, March 16, 2005 9:45 PM
> Subject: Re: [urq] Help me with my Boost pressure testing methodology
>
>
> > Thanks, Ado
> >
> > Pressure test (on major plumbing) came out perfectly and spraying
> > statrting
> > fluid on all the other hoses revealed nothing.  Actually, I think I've
> > narrowed it down to the fuel distributor (ouch!) or possibly melted cat.
> > The ECU tests seem OK.  Still need to check fuel flow (pressure checks
out
> > OK as well).
> >
> > Suggestions welcome.
> >
> > Ingo
> >
> >
> > ----- Original Message ----- 
> > From: "Ado Sigal" <a.sigal at bluewin.ch>
> > Cc: "Ingo Rautenberg" <i.rautenberg at waratap.com>; <urq at audifans.com>
> > Sent: Wednesday, March 16, 2005 7:40 PM
> > Subject: Re: [urq] Help me with my Boost pressure testing methodology
> >
> >> Ingo, you should plug top of the ribbed hose from the igloo on one
side,
> >> and hose into throttle body on the other, with one end valved. Most
> >> suspect components are in that chain. Have seen several places selling
> >> those, mostly for RS2. Brewing industry supplier should carry that size
> >> plugs in various materials.
> >>
> >> Cheers,
> >>
> >> Ado
> >>
> >>
> >>
> >>
> >> -- 
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> >>
> >
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>
>


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