3B ECU pin 54

[Mike Sylvester]

This weekend I decided to ground ECU pin 54 as the Bentley states it
should be.
This is pin 3 of the coding plug.

Wasn't good.  The car ran awful. The timing seemed very retarded.

I'm not sure what coding option this is selecting, but it isn't right
for my application.

Mike

www.urq20v.com

> -------- Original Message --------
> Subject: RE: 3B ECU pin 54
> From: "Mike Sylvester" <mike at urq20v.com>
> Date: Sun, February 28, 2010 1:47 pm
> To: "Bernie Benz" <b.benz at charter.net>
> Cc: "200q20V mailing list" <200q20v at audifans.com>
 > 
> > 
> > On Feb 27, 2010, at 12:47 PM, Mike Sylvester wrote:
> > 
> > > The Bentley sect. 28.44 states that the 3B ECU pin 54 is ground.
> > > The wiring diagram page 541 current track 43 shows it going to  
> > > connector
> > > T6f pin 3.
> > > It doesn't appear that this is pin is connected to anything on the  
> > > other
> > > half of the connector.
> > >
> > > I think T6f is the software coding plug.
> > >
> > > I measured this pin on my car, with the ECU connector removed, and  
> > > it is
> > > not connected to ground.
> > >
> > > Can anyone tell me if it is grounded on your car?
> > >
> > > I'm trying to debug some running issues.
> > >
> > > 1.)  Occasional hard misfire at very light throttle.
> > > 2.)  erratic acceleration and low boost.
> > >
> > > I've already verified the following sensors and wiring:
> > >
> > > MFTS
> > > intake air temp
> > > engine speed sensor
> > > timing reference sensor
> > > Altitude sensor
> > > coolant temp sensor
> > > Ground connections at ECU pins 10,14,24
> > >
> > > I ran the ECU output test and everything clicks as it should.
> > >
> > > I'm running out of things to check.
> > >
> > > Mike
> > >
> > > www.urq20v.com
> > >
> > >
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