Date: Sat, 23 Oct 2010 17:49:59 -0700
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: WAS: OBD Reader.... NOW: High and Low Voltage Wires. Problem
Solved??
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It will be interesting to see if this 'fix' sticks.
I'm mildly skeptical..
but ..hey ...if those problems are now gone ..
that'll make me a believer.
just never ran into it anywhere ever.
I think it's semi-normal almost for one of your engines to have an uneven
warm idle....when miles are high.
I'd go for things like intake leaks..
worn valve guides or seals,
carbon deposits on the top side of the intake valves ..
things like that.
I never hear of it anymore ..
but when such cars where newer ...shops would clean intake valves in place,
fairly often.
Even blasting with walnut shells.
Supposedly BMW and Chevron worked together on the gasoline formulation when
that was a problem back when.
in any case...for uneven idle I would be thinking about everything to do
with 'air' ..
engines are just air pumps after all. They're like an air pump driven by
internal combustion that also drives pistons downward ..but it is all
about air flow ..particularly about smooth warm idle.
Scott
----- Original Message -----
From: "neil n" <musomuso@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, October 23, 2010 5:15 PM
Subject: WAS: OBD Reader.... NOW: High and Low Voltage Wires. Problem
Solved??
> Hi all.
>
> Since my laptop code reader stopped working, I went old school and used
> OBD1
> blink codes. I found ECT and VSS as before, but also IAC (idle air
> control)
> and CMP (hall sensor on dizzy) Whaaa?
>
> Seems the related wires were too close to the ign. coil high tension lead
> (Pic: *http://tinyurl.com/3xse3mj ) *allowing interference from high
> voltage leads to leak into these wires. Repositioned wires, wrapped new
> ECT
> wires with tape, no more codes.
>
> Bonus: This may also cure the CEL intermittently lighting up, and brief
> idle
> hunt when restarted hot. It may be that hot weather exacerbated the high
> voltage leak.
>
>
> Neil.
>
>
>
> On Wed, Oct 13, 2010 at 9:59 PM, neil n <musomuso@gmail.com> wrote:
>
>
>
>> Any recommends on an affordable but thorough code reader? Using Ross Tech
>> freeware I found this DTC: "Intermittent Short To Ground Coolant sensor"
>> DTC. I need something for the engine management that is that thorough.
>> For
>> lack of a better term.
>>
>>
>
> --
> Neil Nicholson '81 VanaJetta 2.0 "Jaco"
>
> http://tubaneil.googlepages.com/
>
> http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
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