Update - [s-cars] MTM 1+ upgrade ---now stalling

[Mihnea Cotet]

Maybe one of the chips popped out? I had this happen once to one of my
customers, because his AAN ECU wasn't socketed from the factory and thus it
didn't have the chips retaining clips, and one of his chips went out of its
socket... I've seen pics of open ECUs done by Hoppen/Anderson and it seems
to me they were using tie wraps to keep the chips on the sockets, maybe
they don't do it anymore?

Just a thought,


Mihnea

At 11:48 1/04/2003 -0500, Robert Pastore wrote:
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>You are probably on the right track, but you should also consider the
>possibility of a bad ignition switch.
>Bob
>
>-----Original Message-----
>From: bob.rossato at att.net [mailto:bob.rossato at att.net]
>Sent: Tuesday, April 01, 2003 11:13 AM
>To: William Perron
>Cc: s-car-list at audifans.com
>Subject: RE: Update - [s-cars] MTM 1+ upgrade ---now stalling
>
>
>Sounds like you may have a cold solder joint.  I've heard of a couple of
>people
>having problems with their Hoppen MTM upgrade during the last GP.  I
>don't
>think a lot of people were affected but it shouldn't have happened at
>all.
>
>Bob
>
> > Thanks to Bill M, Bruce M, Linus and Ray T who
> > responded.  I ended up checking all the hoses - all OK
> > no tears, all properly clamped and connected.  I also
> > removed the bypass valve and checked for proper
> > operation.  It too was ok.  I checked the O2 sensor-
> > working properly.  Also double checked spark plug
> > tightness.  Apparently the problem is actually in the
> > newly upgraded ECU itself.  I noticed that 1/2 the
> > time the "check engine light" flickers when the key is
> > turned to the run position- normally in my experience
> > this should be on continuously.  I can also hear
> > relays clicking and the ECU clicking whenever the car
> > stalls/ or is just about to stall.  Last night (colder
> > around 30 F) stalling was much more frequent - about
> > 15 times during troubleshooting/driving.  Sometimes
> > tapping/lightly rapping the ECU will cause it to stall
> > also.  Sometimes it will crank and not restart.
> >
> > So I will be sending my ECU back to Hoppen, I can't
> > say that I'm to impressed with there soldering
>
> > techniques.  Has anyone else had problems with
> > modified ECUs?
> >
> > -Bill Perron
> > '85 4kq (driver)
> > '95.5 S6 Avant (paking lot ornamentation)
> >
> > >
> > > > -----Original Message-----
> > > > From: s-car-list-admin at audifans.com
> > > > [mailto:s-car-list-admin at audifans.com] On Behalf
> > > Of William Perron
> > > > Sent: Thursday, March 27, 2003 8:16 AM
> > > > To: s-car-list at audifans.com
> > > > Subject: [s-cars] MTM 1+ upgrade ---now stalling
> > > >
> > > >
> > > > *Long*
> > > > I finally broke down and upgraded to the MTM 1+
> > > > chip/sensor in my S6 Avant.  Installed last friday
> > > -
> > > > took a few runs around in it and left it as I went
> > > > away for the weekend.  Drove it on Monday - got
> > > really
> > > > into the boost - evertyhing fine.  Car sat for
> > > tues
> > > > and Wed.  Got in car and drove to work - also got
> > > into
> > > > the boost.  Pulled into work , parked in spot and
> > > > idled for 10 sec.  Then the car just died.  I try
> > > > restarting - starts instantly.  Sat there for
> > > another
>
> > > > 30 seconds idling- everything seems fine.  Shut
> > > car
> > > > off.  Go out a few hours later to make a run over
> > > to
> > > > my companies test facility.  Get moderately into
> > > boost
> > > > on trip over.  COming off the highway I coast to a
> > > > stop .  Car dies- I restart w/ no problems.  Drive
> > > up
> > > > to stop sign a few block later car dies- restart -
> > > > dies 2 sec later. Restart.  Manage to get it to my
> > > > condo by holding foot on gas at stop signs/lights
> > > .
> > > > Park in condo spot - car idles fine??  Pull codes
> > > -
> > > > only one 2214 "engine overrev"??-- I don't
> > > remember
> > > > getting it up even close to the redline.   Car
> > > idles
> > > > for 5 minutes and seems fine.  Ended up driving
> > > the
> > > > trusty 4kq back to work.
> > > >
> > > >
> > > > Any ideas on what the problem is ?
> > > >
> > > > Vacuum leak?
> > > > I am still on the stock hoses and bypass valve at
> > > 74k.
> > > >  Would failure of these cause stalling?
> > > >
> > > > Bad ISV?
> > > >
> > > > Other likely culprits?
> > > >
> > > > Help!
> > > > -Bill Perron
>
> > > > '95.5 S6 Avant
> > > > '85 4kq
> > > >
> > > >
> > > >
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