[s-cars] I want my MPG

[Theodore Chen]

i installed a new set of F5DP0R plugs and the misfire is gone.  the car pulls cleanly to redline at WOT, so i can rule out ignition coils and POS.

however, block 9, O2 sensor adaptation, is still low, at 71 now.  the engine is running great, and if i hadn't already used VAG-COM on the car, i wouldn't know there was anything wrong.

i'm debating whether to replace the O2 sensor.  the shop said the O2 sensor was fine, and the low O2 sensor adaptation reading seems to be consistent with the low number of crossings in the lambda readings (which are averaging over 1).

bentley suggests the following:
1. check O2 sensor (road test, presumably to get everything hot)
2. check MAF
3. check fuel pressure
4. check for leaks in intake tract

which would you do first?  i already did the road test.

----- Original Message ----
From: Theodore Chen <tedebearp at yahoo.com>
To: David Forgie <forgied at shaw.ca>; s-car-list <s-car-list at audifans.com>
Cc: Mark Strangways <StrangConst at rogers.com>
Sent: Tuesday, June 17, 2008 8:14:47 PM
Subject: Re: [s-cars] I want my MPG

by the way, anybody know where to find a description of the other groups in VAG-COM?  group 003 showed the last block with the label "temperature" and the value was between 58 and 65 degrees C.  is this intake charge temperature?  a quick read of bentley turned up nothing about group 003 in bentley - or any group other than 000, for that matter.

----- Original Message ----
From: Theodore Chen <tedebearp at yahoo.com>
To: David Forgie <forgied at shaw.ca>; s-car-list <s-car-list at audifans.com>
Cc: Mark Strangways <StrangConst at rogers.com>
Sent: Tuesday, June 17, 2008 7:22:19 PM
Subject: Re: [s-cars] I want my MPG

i just used VAG-COM on the car.  it's reading 206, which according to bentley, is within spec (range 184-215 and appears to correlate to 185-220 deg. F).  i was looking at group 000, block 1.  bentley says this field is the engine coolant temperature.

here's group 000:
206 022 080 128 098 129 056 129 066 037

note that block 9 has a value of 66.  this is O2S adaptation, and normal range is 100-141.  the car was pretty hot after a 20 mile trip on the freeway, and a short stop at the store.  i got home and left it running while i ran the codes.  block 8, O2S control, is 128 (spec 123-133).  i already tightened the clamps on the samco hose between the MAF and the turbo.  not sure what's going on here.

shop said the O2 sensor was OK, but maybe i should replace it?

-t.

----- Original Message ----
From: David Forgie <forgied at shaw.ca>
To: s-car-list <s-car-list at audifans.com>
Cc: Mark Strangways <StrangConst at rogers.com>
Sent: Thursday, June 12, 2008 8:08:01 AM
Subject: Re: [s-cars] I want my MPG

Mark:  I know you suggested the temp sensor before.  That is why I made my earlier post,
regarding the location and function of the G62 temp sensor:

http://www.audifans.com/pipermail/s-car-list/2008-June/067066.html

I think that your temp sensor suggestion was an excellent one and that
Teddy should pursue (sp?) that one over all others (at least initially).

Dave F.

----- Original Message -----
From: Mark Strangways <StrangConst at rogers.com>
Date: Thursday, June 12, 2008 7:35 am
Subject: Re: [s-cars] I want my MPG
To: David Forgie <forgied at shaw.ca>, s-car-list <s-car-list at audifans.com>

> Yeah well I also suggested the water temp sensor about 12 hours 
> ago....But I did not do it with such finesse I suppose.
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