[V8] UPDATE Engine Trouble (v6 - but still Audi)

[Jason Wilkerson]

Thanks for the info, I'm in souther West virginia.  I did get a code it was 4444 - or no trouble codes set.  I'm going to check the crank sensor, like many have mentioned - where is it?  I know it is probably under the front pulley or on or near the bellhousing.  Any general direction would be great.  I know that oil went everywhere down there - it was even up on the the timing belt cover (outer) because of that spraying gasket - maybe a sensor got shorted because of the oil spray?  Just a thought.  Thanks.  

--- On Sun, 10/25/09, Tony and Lillie <tonyandlillie1 at earthlink.net> wrote:

> From: Tony and Lillie <tonyandlillie1 at earthlink.net>
> Subject: Re: [V8] UPDATE Engine Trouble (v6 - but still Audi)
> To: "ville.hiivola at suomi24.fi" <ville.hiivola at suomi24.fi>, v8 at audifans.com
> Date: Sunday, October 25, 2009, 11:32 AM
> Correct. If you have a completely
> dead ECU, you will have no communication. That's quite
> commonly seen on later VAG procucts in both the trans
> computers (water in the passenger floor) and ABS modules.
> You get no communication and no codes.
> 
> Having said that, it is possible for one portion of the ECU
> to go bad. But, it's not that common. However, it did happen
> to my V8Q. In that case, the ECU could not see the engine
> coolant temp sender signal to adjust the mixture, so it
> started VERY poorly. I checked everything out, and in the
> end replaced the ECU. Problem solved.
> 
> In regards to the V6 vs VR6, there are similarities.
> However, the basic engine hardware is completely different.
> The 2.8 12V V6 in the Audi's is a conventional v-6 with
> seperate cylinder heads and a timing belt on the front of
> the engine. The 2.8 12v VR6 is a 15degree v-6 with one
> cylinder head bolted to the single head deck surface. It
> uses a timing chain, mounted at the rear of the engine, as
> do all the VR6 engines.------However, these engines were
> both produced at about the same time, and both use very
> similar Bosch Motronic engine control systems. So, a lot of
> the basic troubleshooting is the same.
> 
> As for checking the crank position sensor, pull the plug to
> it and ohms check it. Just like on the V8Q, two of the
> terminals (I think the outside) should measure about 1000
> ohms. If not, it's fried. BTW, I'll agree that no spark and
> no fuel points in that general direction. The ECU is more
> than likely not seeing a signal that it needs for the engine
> to run, and therefore is not producing the feedback of fuel
> and spark. I'd be looking at the crank and cam postion
> sensors first, then checking the wiring to the ECU from
> those sensors. Also, depending on how hot the engine got
> (not very from the sounds of it) you may want to give it a
> good lookover for any melted/burned wires.
> 
> Jason, where are you located?
> 
> Tony
> 
> 
> 
> >Subject: [V8]  UPDATE Engine Trouble (v6 - but
> still Audi)
> >
> >I wouldn't suspect a totally dead ECU, since he was
> able to read codes, 
> >right?
> >
> >>----Alkuperäinen viesti----
> >>
> >>Jason Wilkerson wrote:
> >> > What would cause no spark and no fuel? 
> Thanks.
> >>
> >>Another guess: no spark and no fuel points to the
> ECU not letting 
> >that happen. 
> >>It could be the ECU doesn't get a signal from the
> CPS, and so isn't 
> >letting fuel 
> >>and spark happen. It could be the ECU is dead
> _______________________________________________
> Audifans V8 mailing list
> Send posts to: mailto:V8 at audifans.com
> Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
> 
> You can help keep the audifans site running by shopping at
> http://audifans.com/shop/
> 
>