V6 no start update - it starts

[Chris Perry]

This is EFI right?  I had a friend who called me a while back because
his A4 1.8t wouldn't start.  I took my VAG-Com over and we spend quite a
lot of time troubleshooting this and that.  Absolutely everything
checked out perfect.  What I ended up doing (on a whim) was just
cranking the car over for about 10 seconds while holding the gas pedal
down all the way. After about 10 seconds it started up just fine and ran
perfectly.  After doing some research I found out that the EFI cars no
longer use a cold start injector but just send extra fuel through the
injectors when it is cold.  This works well until a certain condition is
met.

Say you come home from work and leave the car in the driveway.  The
engine cools down and you go out later (when the engine is stone cold)
and start the car and pull it into the garage and shut it off
immediately.  The next morning you want to do some work in the garage so
you start the car up and pull it into the driveway and shut it down
again immediately.  Chances are the next time you go to start the car
(like to pull it back into the garage) it will not start.  The engine is
essentially flooded because of the extra fuel the engine has been given
because it is full and since you start the car and turn it off quickly
(just to pull into/out of the garage) you are not giving the extra fuel
a chance to burn up or other wise escape.  Apparently mashing the
accelerater to the floor while cranking the car over tells the computer
to ease up on the fuel delivery until the car starts.  

The article I read says this is common to all "newer" EFI cars. The way
to keep this from happening is to let the car idle for a minute or so
after you start it before turning it off. This allows the extra fuel to
be burned or ejected.

HTH, 
Chris Perry



-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
On Behalf Of Kent McLean
Sent: Tuesday, February 08, 2005 6:31 PM
To: quattro-list; V6-12V list
Subject: Re: V6 no start update - it starts


Yesterday I had the car towed to the mechanic. Before we put
it on the flat bed, I tried one more time -- half a cough, but still
no-start.  Today the mechanic looked at it. Whenever he gets a
non-starting car in, he automatically replaces the plugs. Which I had
just done on Sunday (0 miles on the plugs, since the car wouldn't start
for me). He got in the car, pumped it hard, and -- the M.F. started!!!

He let it run, shut it down, started it right back up. The third time,
letting it idle, it stalled. Hooray! Pulling the real codes with a
Vag-Com (not the blink codes with the CEL), it showed two bad O2
sensors.  I'll replace them tomorrow.

The mechanic didn't do anything I didn't do. Well, except for pumping
the gas hard (I just pumped it). It started for him, but not for me.  Go
figure.

So, what did we learn?  Audis are enigmatic, mysterious beasts that are
not to be trusted.  I'm sorry I can't say, "It was the fritzmitz."

Oh, and the car now has a name.

--
Kent McLean
'94 100 S Avant, "Moody"
'89 200 TQ, "Bad Puppy" is no more

_______________________________________________
quattro mailing list
quattro at audifans.com http://www.audifans.com/mailman/listinfo/quattro

-- 
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.6 - Release Date: 2/7/2005
 

-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.8.6 - Release Date: 2/7/2005