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

[Linus Toy]

Sounds like the compressor bypass valve...
They work great, and for a long time at stock boost levels...then you had to
go and muck things up with the MTM 1+ ;)

The original BPV has been superseded by the current issue 1.8t/2.7tt BPV.
Should be about $40-50 from most Bosch parts sources, Audi # 06A 145 710N
(commonly referred to as the "710N" valve), Bosch # 0 280 142 114.

Others (many?) will tell you that any Bosch BPV will fail in a chipped (or
even stock) car, and suggest you to spend more $ for a Forge, Bailey or
other aftermarket BPV...your call--I have no experience here.

--------------------------------------------------------
Linus Toy               Insanity is doing the same thing
Mercer Island, WA       you've always done and expecting
linust at mindspring.com   different results
                        - Roger Milliken, Milliken & Co
--------------------------------------------------------

> -----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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