Fw: Once more into the void...- does someone have a flashlight?

[JOHN SHERROW]

Second thought since the ISV control unit also controls the decel valve
maybe the control unit is kaput and not controlling the ISV or the decel
valve properly.

----- Original Message ----- 
From: "Adam A. Luy" <Adam at RoutersInc.com>
To: "Fuzzzydog" <fuzzzydog at gmail.com>; <quattro at audifans.com>
Sent: Tuesday, October 24, 2006 1:57 PM
Subject: RE: Once more into the void...- does someone have a flashlight?


> Doesn't stall when oil cap is removed? It should, or at least run real
> bad. Sounds like a vac leak and the car is idling high to keep from
> stalling.
>
> My $.02
>
> -Adam
>
> -----Original Message-----
> From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com]
> On Behalf Of Fuzzzydog
> Sent: Tuesday, October 24, 2006 10:29 AM
> To: quattro at audifans.com
> Subject: Once more into the void...- does someone have a flashlight?
>
> Hello all, been away for a while since I picked up a 4X4 and returned to
> my offroading passion, but the 88 5KTQ avant has lured me back.
> Unfortunately it is a love/hate relationship.....:(
>
> It is a sweet car - for the most part been running very well since I've
> owned it.  But recently I have developed an intermittent high idle that
> is defying all efforts to fix.  I have read SJM and other sites and done
> a lot of checking.  Right now I am considering different types of rope
> for a noose to put myself out of my misery.  Before I go to that
> extreme, I am hoping someone can point out what I have missed....
>
> Symptoms:
>
> MC engine, turbo, 5 speed, all stock - no mods.
>
> starts up very well, idle a tad high but slowly starts fluctuating and
> getting higher as it warms up.  go for a drive and now it won't come off
> high idle - ie coming to a stop, push in the clutch and rpm stay at
> about 3k.  sometimes, only sometimes, I can let the clutch out to bring
> the rpm down and they will stay down right around 800. this is rare
> though - usually I sit there at the stop light with the engine doing 3k
> rpm.
> car does not stall when oil cap is removed - even when idle is ok
> always, ALWAYS, filled with Chevron super supreme - problem has
> persisted over many fill ups high speed is not affected - done a
> consistent 140km/hr trip recently - pulls like a freight train.
> oh yeah - this might be important -  when the high idle problem is
> there, and I am coasting along at any speed, if I let my foot right off
> the gas it keeps motoring along (because of the high idle) BUT, as soon
> as I give it some gas to speed up there is a 'dead spot' right off idle.
> The car bucks a bit as if fuel or spark were shut off, then it picks
> right up and away we go.  this dead spot is not there when the high idle
> problem is not present (remember, the problem is intermittent)
>
> things I have done.
> checked idle switch - opened, resoldered, tested - all good replaced ISV
> with one that came out of a properly working car checked for broken vac
> hoses - all good that I could see checked idle controller under dash and
> saw that 1 wire was broken completely apart - fixed - no love - didn't
> cure the problem battery is new MFTS is brand new 3 wire swapped the
> small single wire temp sensor at the top front of the engine.
> checked wiring/hose connections - nothing stood out.
>
> Willing to listen to any and all suggestions I have lots of spare parts
> that I can swap out from a previously good running 5ktq sedan.
>
> Thanks for reading and looking forward to your input.
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