[V8] flash of death

[D Morralee]

I saw it on TV a few nights ago about the problem with the VW & Audis …… sorry for getting off track … I forgot the engine was still running but the transmission wasn't engaged . 

 

hmmm where to start :-) 

here is what I can tell you , when I first had the problem I posted on this great list of V8er . I had all the responses you would expect with a problem like this, its the Engine Reference sensor , bad coils , etc . So what do you do ?

Taking the car to a shop in Ottawa and finding someone to diagnose the problem is a futile experiences. I engaged Bruce at German Auto Connections as he is one of the best in North America for Mechanical and Electrical knowledge on the V8's . Bruce was at a loss to what my problem was, he also was surprised to hear that it was the Speedo Transmitter ( S.T.) in the transmission was causing the engine to switch off . 

So this is what I can tell you . A Faulty S. T. on my car caused the engine to DIE . 

How do I know this , because I unplugged* the S.T. and the problem hasn't come back in 6 weeks of driving . 

How did I figure out the problem, by reading the manual ( transmission manual ) a few times … boy that can put you to sleep ! 

 

There are two types of S.T. one has two prongs and the other one has three. The one I took out of the my Audi was a three prong one. The spare one I took out of my brand new Automatic transmission was two pronged. When I put the two pronged one into my transmission it doubled the KHP on the Speedo ….. When I hit 220 KPH (140 MPH ) really only 110 KPH , What did the engine do ? it started to shut on and off …. Do these cars have a Rev or KPH/MPH limiter ? If so do you think now that there might be a link to engine management ( ECU ) ?

As an trained aircraft engineer ( mechanical ) the only time my car has gone to the shop is twice , once for tires and once for a exhaust mod .

Do all my own work ... I know it took me two years to figure it out , but I did . 

 

*I'm still waiting for the correct one to come in … so the Speedo is not working as the S.T. is missing . 


 
> To: superdaveski at hotmail.com
> CC: v8 at audifans.com; quattro at audifans.com
> Date: Mon, 24 Aug 2009 11:48:35 -0400
> Subject: Re: [V8] flash of death
> From: cobram at juno.com
> 
> The failure mode is different. The box goes into neutral, the engine
> keeps running, and while it is a temp sender, it doesn't seem to be temp
> related. 
> 
> The speedo transmitter will NOT kill the engine in a V8Q, nothing to do
> with the engine management system at all. If you mean the Engine
> reference sender, that will kill it, I'm aware of it, and coincidentally
> I was one of the first ones to post the info to the list back in the days
> when the qlist was at coimbra. It took your tech that long to figure
> out because yours is probably the only V8Q the guys ever worked on, and
> you didn't consult the V8Q list, these cars are like hens teeth, techs
> who know their way around them are even rarer, more so as they age. 
> 
> Here's another link to the defect:
> 
> http://tiny.cc/Video877 
> 
> A bad reference sender or sensor going bad is more akin to a coil failure
> etc. than what's happening here.
> 
> 
> BCNU,
> http://www.geocities.com/cobramsri/
> Most conversations are simply monologues delivered in the presence of
> witnesses.
> 
> 
> D Morralee <superdaveski at hotmail.com> writes:
> 
> >well this is not true . ( no disrespect to your comment ) Over the last
> two years I had this type of failure 
> >on my 93V84.s after 15-20 mins of driving . The car would just go dead,
> but always had no problem 
> >restarting. The cause was the Speedo Transmitter in the Transmission .
> This made the speedometer go 
> >all wonky and then the car would just quit . It took a long time to
> figuar out that the Speedo Transmitter 
> >could get heat soaked and fail . Why did it take two years to figuar out
> ... because this is a rare problem . 
> >fwiw. cheers superdave 

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