B5 S4 No start

Grant Lenahan glenahan at vfemail.net
Thu Dec 21 19:43:38 EST 2006

The famous ignition switch?
On Dec 21, 2006, at 6:11 PM, Mark R wrote:

> Thought I'd throw it out there to see if anyone has any BTDT on the 
> modern
> Audis.
> This car has a shady history- front end wreck, purchased by local kid 
> and
> his dad to fix up, recently sold to another local (this one in 
> college).
> Car definately has aftermarket turbos, downpipes, Hatachi MAF 
> conversion
> (AWE), etc.  Only prior experience I have with the car is clearing 
> codes
> (random misfires) and CEL (repair of MAF wiring splice, then clearing
> codes).
> Just prior to being sold to current owner, car was run out of gas.
> New owner drives car in for tires at a local tire place, several hours
> later, it won't start.  Cranks well, no start.  I tow car to my place, 
> add
> fuel (approx. 2 gallons, as 1/8 tank showing), change fuel filter (I 
> hate
> where they put them on the Quattros, but that's ANOTHER tirade).  
> Still no
> start.
> Cranks well, added a battery booster (even though battery was topped 
> off),
> but no start,  Shows no codes (this is what surprises me).  Fuses in 
> fuse
> panel check OK.
> I pulled ECU overnight, reset the batt. disconnected code.  No start.  
> I
> have a stock ECU from my own S4 I tried as well (same P/N, one month 
> apart
> in production).  Same results.
> Noticeable is that MAF g/s show as "0" while cranking.  IDK if this is
> "normal" or not.  I don't think I've ever cranked a newer Audi more 
> than a
> few seconds.
> So I have to do the "back to basics" approach (spark, fuel, air) to
> diagnose, but I suspect I'll find some faulty wiring (since the car has
> shady history and major work done in the past).
> Any BTDT?  Good ideas?  What gets me is no codes at all.
> Thanks!
> Mark Rosenkrantz
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