[s-cars] Possible MAF Issue

Mon Dec 29 14:59:20 PST 2008

This sounds like one of the coils going out.  That's the way mine acted with 
the original coils.
Jerry
----- Original Message ----- 
From: "Chris Hawkins" <ripit69 at comcast.net>
To: <pkrasusky at ups.com>; <s-car-list at audifans.com>
Sent: Monday, December 29, 2008 12:49 PM
Subject: Re: [s-cars] Possible MAF Issue

> Hey Paul,
>
>
>
> Much thanks, hope you had a great Christmas with the fam as well.
>
>
>
> Can't be the POS because I swapped out to the 034 HO Coil Kit which
> eliminates the Pieces..OS.  I wish I could capture a moment when idling to
> have a chance to pull injector plugs, etc. but it never lasts long enough 
> at
> idle to do anything.  Every time I've tried the issue disappears as I'm
> opening the hood or before I can even get out of the car.  The issue 
> happens
> so randomly it's driving me nuts.  Only time I can reliably recreate the
> stutter is under some heavy throttle in 3rd to 6th but pulling injector
> plugs is out of the question at those speeds ;-).  Longest duration was
> about 2 minutes while driving on the Merritt in moderate traffic, never 
> had
> the chance to pull over.
>
>
>
> MAF has been carefully cleaned with CRC MAF cleaner when I took everything
> apart for the upgrades.
>
>
>
> Do you know how limp mode is achieved, ie; what does the ECU do to reduce
> power?
>
>
>
> Thanks again.  We'll definitely catch up for a spin soon.
>
>
>
> Chris
>
>
>
>  _____
>
> From: pkrasusky at ups.com [mailto:pkrasusky at ups.com]
> Sent: Monday, December 29, 2008 8:52 AM
> To: s-car-list at audifans.com; ripit69 at comcast.net
> Subject: RE: Possible MAF Issue
>
>
>
>
>
> Chris missed:
>
>
>
> <<<Date: Sun, 28 Dec 2008 15:59:52 -0500
>
> From: "Chris Hawkins" <ripit69 at comcast.net>
>
> Subject: [s-cars] Possible MAF Issue
>
>
>
> Happy Holidays to all.  I'm trying to chase down a miss or apparent limp
>
> mode issue with my '95 UrS6.  Issue began about a month before I installed 
> a
>
> bunch of RS2 upgrades.  Before the upgrades the car had stock K24,
>
> injectors, MRC 2+ custom(Paul K. tune) & FMIC.
>
>
>
> I don't have a VAG-COM(yet, ordered one the other day.  Thanks Santa.) but
>
> the only blink code I got was 2121.  The stutter appears randomly, at idle
>
> or any other throttle position to WOT and at any speed.  It disappears 
> just
>
> as randomly.  It generally doesn't last too long, anywhere from about 2 
> sec.
>
> to a few minutes.  Fuel filter is new, coils are new 034 HO, injectors are
>
> new 034 RS2 reps, fuel pump is original OE to the best of my knowledge,
>
> however I have a 044 HO pump going in soon, software is the 034 RS2 tune.
>
>
>
> My initial suspicions were coil or fuel pump but the stuttering reminds me
>
> of a MAF issue I had on a normally aspirated '95 90 a few years ago.  The
>
> sensor turned out to be bad, replaced it with a known good one and the 
> issue
>
> went away.  Code 2121 mentions possible throttle CTP or throttle
>
> cable/dashpot adjustments but I'm not sure if that would cause the random
>
> power loss I'm experiencing.  I re-checked all of my work and the
>
> connections from the upgrades, before I get knee deep in testing the coils 
> &
>
> fuel pump, etc. are there any BTDT with the same symptoms?  I'm really
>
> curious if I'm looking at a MAF issue instead.  Any spare AAN/RS2/P968 
> MAF's
>
> laying around just in case?
>
>
>
> Chris>>>
>
>
>
>
>
>
>
>
>
> Hey Chris-
>
>
>
> This onset / offset misfire sounds verrrrrymuch like a POS failure that
> cropped up on me in that car yearsss ago.  It would come / go / come / go
> until it eventually (within a few daze) it was a full time miss.  Much
> different sensation / scenario than my coil failure.
>
>
>
> To repair I utilized the Get Out Of Jail Free POS "spare channel" (@ Jim 
> P's
> in Maine whilst on vacay no less, with Batphone into Domo Oregato Mr.
> Bobatto to handhold me thru heh heh), so sowwy Charlie - you'd have to get 
> a
> new POS.  They're OE in there unless you've swapped so 180k or whatever
> ain't shabby.
>
>
>
> You're lucky if you can get it to miss @ idle, simply jump out and yank
> injectors until one don't make no difference - voila - isolated which jug 
> is
> 'off'.
>
>
> MAF was OE too and I did run a K&N at one point, mebbe it 'shortened' it's
> life or maybe it's just on way out due to newfound RS2 and the mileage. 
> Try
> spraying the MAF connection with contact cleaner, can't hurt.
>
> FWIW, CPS was new (splice in from the Steve Y. GP) when I did the tbelt 
> the
> month prior to your getting it.  Fuel pump was new at some point tho it
> could always fail again / early certainly.
>
> My bet's on POS tho based on your symptoms and considering their age, etc.
>
>
>
> Hope you had a great Christmas with the family, etc.  Back to der grind
> today, grrrr.  Beerz soon!  I reeeeally want to check the beast out with 
> the
> RS2 gear heh heh...
>
>
>
> -Paul
>
>
>
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