[Vwdiesel] TDI non-start

[Val Christian]

I think I have fuel right away, because the fuel fog is emitted
from the tail pipe right away, upon cranking.  Fuel is at the filter,
and the bubble content in the clear line is very low to nil.

That tells me that the shutoff is not a factor as well.

I'll get compression numbers on it soon, but I'll eat an old oil filter
if that's the problem, because the economy is good, and once it 
fires up, it instantly runs smooth.  It just doesn't behave
like an engine with poor compression.

Val


> 
> Yeah, that sounds intermittent electrical.  For sure not compression 
> Val.  I would suspect it's similar on Shalyn's rig as well.
> You're sure you have fuel on cranking Val?  I wonder if the fuel is 
> immediate, or if there's a leakdown problem when it's parked, and the 
> injectors don't see fuel right away.
> -james
> 
> 
> Val Christian wrote:
> > Shalyn,
> > 
> > Try changing the glow time to a longer time, and see if the 
> > glow light stays on.  That would at least give you a spot
> > check on some level of ECM functioning.  Then you could switch 
> > back.
> > 
> > I'm working a start issue on my 03 Jetta, which is getting 
> > progressively worse.  I even tested the 4 year old battery.
> > My test showed OK (heck, it'll crank for 3 or 4 minutes!),
> > so I took it to AZ, and their computer tester shows it as 
> > OK as well.  The glows are OK, I lengthed the glow time.
> > I believe the compression is good (economy is good).  The engine
> > is getting fuel, because before it starts, there's a fuel fog.
> > 
> > I bought a new adapter, and will compression check, but I
> > believe that will be a waste of time.  In my case, the irony
> > is that it can be lifeless, cranking away, and then it will just
> > fire up.  You can get full power, and there's no rough running.
> > 
> > The problem has been growing for several years, and 60K miles,
> > so one of these days it just won't work, and I can figure out
> > the real problem.
> > 
> > All the common theories about injectors, compression, etc, I have
> > a hard time believing, because on a good day (no rain, snow),
> > taking a long interstate trip, it will do about 60 mpg tank to 
> > tank.
> > 
> > Good luck.
> > 
> > Val
> > 
> > 
> >> I'm finding that most of the time I'm spending on this problem are 
> >> perusing the manual and the archives at TDIClub.com instead of in the 
> >> driveway with a wrench. 
> >>
> >> I've established that there is some kind of ECM or other electrical 
> >> problem, most likely.  Neither the check engine or glow plug lights come 
> >> on when the key is turned to the "on" position.  This apparently 
> >> indicates that there is no power to the ECM or that the ECM is hosed. 
> >>
> >> Not that I know why that would be.  The 109 relay is brand new.  There 
> >> has been some other weirdness lately.  Some of the adaptations I had 
> >> made w/ VAG-COM have reset themselves to factory settings a couple of 
> >> times and I've had to re-adjust the idle fueling. 
> >>
> >> -Shalyn
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> >>
> > 
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