Date: Wed, 25 Jun 2014 12:08:50 -0700
Reply-To: Alistair Bell <albell@SHAW.CA>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Alistair Bell <albell@SHAW.CA>
Subject: Re: Inconsistent stumbling on resume throttle..Was "vanagon
syndrome?"
In-Reply-To: <CAHTkEu+kwuW0P79n7-eWCwb7bzBtYHhZ7SBPT=Xyqc9AAjjRvg@mail.gmail.com>
Content-Type: text/plain; charset=us-ascii
As mentioned before, you should check the function of the o2 sensor using a multimeter. It isn't hard to do. If you suspect a bad lead then wiggle the lead as you measure and see how the readings change.
The open loop condition, o2 sensor disconnected, is not especially rich.
A malfunctioning o2 sensor can make the van run excessively rich.
One thing that is very useful for troubleshooting your engine is the Bentley manual that includes golf Jetta 89-92. Hard to believe, but the Bentley is very handy to have.
Alistair
> On Jun 25, 2014, at 11:47 AM, Don Hanson <dhanson928@GMAIL.COM> wrote:
>
> Hi thanks all.
>
> So you think the bad wire might be the signal wire. Would that account
> for this intermittent stumbling condition somehow? Is that likely?
>
> If the O2 sensor can be disconnected and the van will then run fine, but
> rich...wouldn't that make it sort of unlikely that the faulty connection
> could cause a real major but sharply periodic interruption of smooth
> power? I mean, if this were a carbed vehicle I would say it was like the
> plugs were suddenly fouling or the gas line was being partially
> plugged....really bad missing and stumbling...front end dips stand on the
> nose missing...then clean and normal power delivery...
>
> anyhow the O2 sensor was due to be changed being old and having lived
> through a ruptured headgasket that I ran almost 2000 miles before repairing.
>
> I am going to change the Temp II sender also right now....because it is
> supposed to be windy tomorrow and I want to go back to my favorite
> windsurfing spot, that 100 mile round trip...My backup van, that Safari,
> it's supposed to get pretty crappy gas mileage and it's all full of tools
> now...
>
>
>
>
>> On Wed, Jun 25, 2014 at 11:04 AM, Karl Wolz <wolzphoto@q.com> wrote:
>>
>> Correct.
>>
>> Karl Wolz
>>
>>
>>
>> |-----Original Message-----
>> |From: Neil N [mailto:musomuso@gmail.com]
>> |Sent: Wednesday, June 25, 2014 10:28 AM
>> |To: Karl Wolz
>> |Cc: vanagon@gerry.vanagon.com
>> |Subject: Re: Inconsistent stumbling on resume throttle..Was
>> |"vanagon syndrome?"
>> |
>> |Right. Wondered. So black wire Don saw is likely the O2 voltage output
>> |("signal") wire?
>> |
>> |
>> |On 6/25/14, Karl Wolz <wolzphoto@q.com> wrote:
>> |> Pos and Neg are revesible.
>> |>
>> |> Karl Wolz
>> |>
>> |>
>> |>
>> |> |-----Original Message-----|The 3 wires are:
>> |> |
>> |> |positive, negative for O2 heater and "signal" (voltage
>> |output) to ECU.
>> |> |
>> |
>> |
>> |
>> |--
>> |Neil n
>> |
>> |Blog: tubaneil.blogspot.ca
>> |
>> |'88 Westy http://tinyurl.com/c8rlw6p
>> |
>> |'81 VanaJetta 2.0 "Jaco" http://tubaneil.googlepages.com/
>> |
>> |Vanagon VAG *Gas* inline-VR Engine Swap Group:
>> |
>> |http://tinyurl.com/d7gd5ej
>>
|