Stumble

[Dan DiBiase]

Thanks for the response, Brian.... I think the harness is okay, as it 'clicked' right in when I reinstalled the plug, and the ESP
light went off as well. I assume it would not do that if the wiring was somehow messed up...?

If I had an air leak would that affect the idle? The car idles very smoothly. The only symptom is that 'stumble' around 2500 rpm
that goes away with the MAF unplugged.

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA



________________________________
 From: brian hoeft <qweblog at gmail.com>
To: Dan DiBiase <d_dibiase at yahoo.com> 
Cc: "cobram at juno.com" <cobram at juno.com>; "quattro at audifans.com" <quattro at audifans.com> 
Sent: Sunday, December 4, 2011 3:38 PM
Subject: Re: Stumble
 

Dan, The ECU(s) look to the MAF to calculate load, so the traction control won't like it when you disconnect it. As for your better running condition, just beware that you could have an air leak somewhere and disconnecting the MAF goes to pre-programmed igntition timing/fueling and might be a false positive, so before you go buy a new MAF, just give a thorough look to all your hoses. Also, I recently fixed a MAF plagued customer who had a wild DIY streak. He broke the MAF harness and killed 2 (ebay) MAF's before towing it to me. Bought a new MAF, harness, re-pinned it, and the car was happy. Worth a look there too, to make sure the pins are tight.

good luck.




On Fri, Dec 2, 2011 at 2:20 PM, Dan DiBiase <d_dibiase at yahoo.com> wrote:


>________________________________
> From: "cobram at juno.com" <cobram at juno.com>
>To: d_dibiase at yahoo.com
>Cc: quattro at audifans.com
>Sent: Sunday, November 13, 2011 4:06 PM
>Subject: Re: Stumble
>
>
>Dan DiBiase <d_dibiase at yahoo.com> writes:
>> I cleaned the MAF today. Car seems to run better but I am going to
>> see over the next few days if
>> it really is or whether it is just my imagination..... AutoZone
>> would not check for stored codes since
>> the CEL was not on.
>>
>> Dan D
>> '04 A4 1.8Tq MT-6
>> Central NJ USA
>
>There may be pending codes.  Remove the gas cap, that should trigger a
>CEL which won't interfere with any pendings. 
>Scanners are really cheap these days, or get some torrent software and a
>$5 OBD cable on FleaBay, or a bluetooth for about $20.
>---------------------------------------------------------------
>Haven't had a chance to do this, but I did decide to unplug the MAF and see what happened. The car runs 100% better - no
>stumble - after doing that, so I guess the MAF is indeed the culprit - it needs more than a cleaning. So I will look to order
>one and replace it.
>
>BTW, I thought it strange that the VSC light came on when I unplugged the MAF, and shut off when I plugged it back in. Why
>would that be?
>
>
>Dan D
>'04 A4 1.8Tq MT-6
>Central NJ USA
>
>_______________________________________________
>quattro mailing list
>http://www.audifans.com/mailman/listinfo/quattro
>http://www.audifans.com/kb/List_information
>


-- 
       -Brian
      [blinders off&earplugs out]