pressure transducer swapping step-by-step?

auditude at auditude at
Wed Jan 28 10:05:35 EST 2004

Hi Richard,

I bought the used 3.0 bar sensor from Chris Semple. 
Supposedly it was only used for a few weeks before the PO 
went to a VMAP because that's what his tuner uses.

I may not need "all" the range of the 3.0 bar sensor, but I 
guess if I ever want to exceed 22psi at all, even for short 
periods or rpms ranges, it will be needed to keep the ECU 
involved in the excitement.  For the car this ECU will be used in, I'd like to shoot for the 380hp, chipped RS2 spec goal.

I'm trying not to think about the possibility that the Bosch 
sensor could fail at some point, which was alluded to in a 
thread about VMAP's over on the s-car-list.  How common is 
failure of the sensor?



"Richard Tanimura" <richard at> wrote:
> I have both wick and suction so I am not sure what I used.
> I vaguely recall the cut leads. I don't really know what they are. You got
> one of the few remaining Bosch 3 bar MAP sensors? Lucky dog.
> -----Original Message-----
> From: auditude at [mailto:auditude at]
> Yeah, I'm thinking it probably isn't too bad.  Once I am ready I'll give it
> a shot.  Is this a
> solder wick type of a thing, or one of those vacuum bulbs?
> What's with the extra surrounding leads that look like they are cut off
> shorter, flush with the
> body?  This is on a 3.0 bar PT if that makes a difference.  I have a 2.5 bar
> one coming,
> which will probably go in the 200q20v since it's otherwise stock.
> Thanks,
> Ken
> On 28 Jan 2004 at 5:20, Richard Tanimura wrote:
> > I've done it. It's a piece of cake. Desolder the 3 legs, pop in the new
> one.
> >
> > I would help if you can tell a good solder joint from a bad one though.
> >
> > Rich
> >
> > -----Original Message-----
> > From: 200q20v-bounces at
> >
> > Hi,
> >
> > Is there anything online as far as instructions for swapping the pressure
> > transducer in the
> > (Motronic) ECU?  It doesn't seem the actual procedure would be too
> > difficult, but then again
> > it's not something I want to take lightly.  I was thinking maybe there
> would
> > be an online
> > resource from someone who's BTDT?  Of course, if I'm not confident and
> > comfortable about
> > doing it I'll have a pro do it.
> >
> > Thanks,
> >
> > Ken

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