[s-cars] New stumble.....Altitude related?

[Calvin Craig]

Usually WOT misses are caused by the coil packs, that would be my first
guess.  I am scratching my head a bit on why it doesn't happen worse at
lower altitude since the cylinders would have a denser charge in them down
there.  Does it happen immediately upon WOT application or does the boost
have to build up?  If it happens only after the boost builds a little I
would definitely think coil pack.

--Calvin


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Jim Fleischer
Sent: Friday, December 03, 2010 7:52 PM
To: s-car-list at audifans.com
Subject: [s-cars] New stumble.....Altitude related?


Hey guys,

After 6 months of fairly trouble-free motoring at WOT and plenty of trips
all over the west, I happened on a WOT stumble last week here in the
mountains (7500 ft. elev.) of Colorado.  Here's the kicker......went to
Denver (5200 ft elevation) a few days ago and the stumble wasn't near as bad
down there, still there, but inconsistent and far less noticeable.  I have
about 7500 miles on new NGK plugs and boots (solved my stumble over the
summer) and am wondering if it may finally be a coil.  Car runs good at
idle, and no stumble at partial throttle under load and acceleration on the
highway well past the legal limit here at 7500-8000 ft, but WOT stumble is
consistent at all RPM.  I'll check out possible boost leaks, of course, but
curious if someone out there who did a coil pack conversion has a known good
stock coil pack or two they'd sell cheap.  Should probably have one in the
car anyway.

Any other suggestions welcome of course.  Maybe start with checking the
plugs again?

Thanks for the help, as always.

Jim Fleischer
'95 s6 avant with 105K
_______________________________________________
S-CAR-List mailing list
http://audifans.com/mailman/listinfo/s-car-list
http://www.audifans.com/kb/List_information