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

[ville.hiivola at suomi24.fi]

On our VR6, there was never a code, even though crank sensor was toast. 
I think the ECU on the VR6 is somewhat dumb on that, im not sure if 
thats the case on yours. I suggest you test the sensor by backprobing 
the sensor with a multimeter. If you get pulsing when you start the 
car, then it's ok.

>----Alkuperäinen viesti----
>Lähettäjä: wilke_jb at yahoo.com
>Päivämäärä: 25.10.2009 2:42
>Vastaanottaja: "7013885254"<chance9121 at gmail.com>, "V8 list"
<v8 at audifans.com>
>Aihe: Re: [V8] UPDATE Engine Trouble (v6 - but still Audi)
>
>I aggree, but I see no codes.  Per the procedure, I turned the motor 
over for a few seconds, left the key on, then jumpered the contacts.  
Still no codes.  I assume if I would have not turned the engine over I 
would have gotten a crank position sensor code.  I will look at the 
sensors.  Thanks.
>
>--- On Sat, 10/24/09, 7013885254 <chance9121 at gmail.com> wrote:
>
>> From: 7013885254 <chance9121 at gmail.com>
>> Subject: RE: [V8] UPDATE Engine Trouble (v6 - but still Audi)
>> To: "Jason Wilkerson" <wilke_jb at yahoo.com>, "V8 list" <v8 at audifans.
com>
>> Date: Saturday, October 24, 2009, 6:31 PM
>> I think its a combo of ekectrical
>> frying and interlock.
>> 
>> I would say check for the crank position sensor and cam
>> angle sensor  if it has it for starters.
>> 
>> On the vr6 motors (closest relevance I've got)  if the
>> timming belt slips a tooth or the timming is off too much
>> the ecu withholds fuel and spark.
>> 
>> Number of sensors do this.  I would focus you search
>> to timing and temp related engine sensors in and around the
>> heads, as they likely got the hottest.  
>> 
>> good luck. 
>> 
>> ---- Original Message ----
>> From: "Jason Wilkerson" <wilke_jb at yahoo.com>
>> Date: 10/24/09 5:42 pm
>> To: "V8 list" <v8 at audifans.com>
>> Subj: [V8] UPDATE Engine Trouble (v6 - but still Audi)
>> Ok, time for an update.  I will warn you I am more
>> confused then ever now.
>> 
>> Went to work on it today - tested compression, found same
>> compression numbers I found 6mo ago (when it was running,
>> BTW).  Around 180 psi all around.  Good
>> numbers.  
>> 
>> Then I checked spark - Mind you I assumed that I had spark
>> because it would cough and sputter with starting fluid? -
>> guess what, no spark?  What is the deal with that - I'm
>> thinking that it would try to start with fluid because of
>> compression?  Does that sound crazy?  Anyway, I
>> tryed 6 different plugs, all 3 coils, different wires -
>> still couldn't get it to spark.  What is the
>> deal.  
>> 
>> I'm still not sure that I'm getting fuel out of the
>> injectors, none of the plugs were wet though so it seems as
>> if it isn't getting into the cylinders.  
>> 
>> I pulled the codes - 4444 - no codes present.  
>> 
>> I even tried a new key switch, because it has had trouble
>> in the past - no change.
>> 
>> So - my three current theorys are the following:
>> 
>> 1. The oil leak and loss of pressure is totally unrelated
>> to the no start problem and something like the computer is
>> fried?(hard to belive, I know - but belive it or not I have
>> had something like this happen before) 
>> 
>> 2. There is some sort of interlock that stops fuel and
>> spark if oil pressure drops to protect the engine? Again,
>> I'm not that familiar with this car or it's electrics and I
>> don't have a service manual that I can use.
>> 
>> 3. The engine got hot because of lack of oil and fried
>> something electrical?  
>> 
>> So far, everyones suggestions have been very helpful and
>> sent me to look in various directions - I know the answer is
>> out there - and I'll bet money that someone on this list has
>> it.  Thanks all.
>> 
>> 
>>       
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>
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