[V8] MPG - long overdue update

[Andrew Schlueter]

I can do the same thing with my megasquirt ecu, kinda nice since vag-com rarely works with my car ever.

Andrew W. Schlueter
'90 V8 MQuattro MSnS-E
'90 Jetta VR6TT Quattro
www.huasofdub.com


-----Original Message-----
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com] On Behalf Of Buchholz, Steven
Sent: Wednesday, April 04, 2007 2:11 PM
To: V8 list
Subject: Re: [V8] MPG - long overdue update

... the thing that I find a bit incredible in this sort of discussion is that if you have VAG COM or whatever ProDiag is now called ... the car will tell you what's up.  Why change a temp sensor on suspicion?  I can read exactly what the ECU believes the coolant temp to be ... and if it is incorrect I can troubleshoot.  I can take the car for a drive, log the ECU parameters and read out the engine parameters from the drive.

The data provided by the V8 ECU is not as extensive as that on newer cars, but I find it very helpful for troubleshooting this sort of situation.

Steve B
San José, CA (USA)
> 
> Ok - thanks for the replies.  To answer the few questions - I changed the
> FPR with a low milage, known to work one; I also spliced in an O2- but
> have not had problems with that in the past, plus the wires looked good,
> and I checked the output at the terminal on the engine - it seemed to be
> reading there - the code basically tells me that there is another problem
> with the engine, and that it is so far out of range, that the o2 can't
> sense the actual o2 content because it is either too high or too low.
> This leads to the other comment about the coolant sensor behind the pass
> side head.  Someone mentioned that it may be bad - I checked it but I
> think I will replace it with a known good one just to be sure.  This thing
> has me baffled.  One more thing, I know that I have said this but, One
> cylinder is low on compression - I know this could cause this problem, but

_______________________________________________
Audifans V8 mailing list
Send posts to: mailto:V8 at audifans.com
Manage your list connection: http://www.audifans.com/mailman/listinfo/v8
Have an Audi V8 question?  Check the Audifans Knowledgebase!
http://www.audifans.com/twiki/bin/view/Audi/V8
Have a V8 answer? ... Please help others by adding to the KB ... all contributions welcome!

-- 
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.25/743 - Release Date: 4/2/2007 4:24 PM
 

-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.446 / Virus Database: 268.18.25/743 - Release Date: 4/2/2007 4:24 PM