[T3] Mystery Miss

Wed May 11 20:39:17 PDT 2016

I am sort of lost here. I will offer my 2 cents . I feel the less amount of 
connectors the better . I don't see a black or white wire in the photo they 
must be up and more to the front of the engine. You need some sort of 
connector if you need to disconnect the ECU from the main harness. Just from 
the  photo I would get rid of the two sets of red male and female butt 
connectors and make a solid slice . I prefer tinned wires then slide on heat 
shrink far back so it won't shrink from solder iron heat then meet the 
tinned ends at their centers and twist center out and solder then slide the 
heat shink over the splice and shrink it to seal the joint. Use long enough 
wires to reach the ends you had taped and add a bit so you can tie the 
harness up away from the motor then add two female ends to connect to the 
taped male ends which also need to be covered and sealed . If you don't 
solder then used butt connectors to the black and white leads yet still use 
heat shrink over the butt connectors and shrink it. You need to keep them 
dry and sealed . You end up with only two male and female connectors and the 
two butt splices. Ford used to make red butt connectors that had a heat 
shrink build into the ends to seal them , don't know but someone has to 
offer them. If you don't need to unplug the harness use butt connectors at 
both ends with heat shrink . Connectors are always the trouble source.

 Do you have a better photo of what you have now?

 William
----- Original Message ----- 
From: "Daniel Nohejl" <d.nohejl at gmail.com>
To: <type3 at vwtype3.org>
Sent: Wednesday, May 11, 2016 5:02 PM
Subject: Re: [T3] Mystery Miss

> Ok, I think we may have solved it!
>
> Figuring something must be loose because bumps would trigger the problem, 
> we started tugging on wires and connectors with the motor running. By 
> tugging on where the MPS wiring meets the power wires for the ECU, we were 
> able to get the motor to miss repeatedly at idle. It took a while to 
> figure out if it was the MPS itself, the MPS wiring, or the power wires. 
> At one point, in moving wires, the motor cut out entirely. After more 
> careful jiggling and isolating all the wires from each other, we isolated 
> the problem to the ECU power wires. If they were jiggled just so, the 
> motor would miss. On two occasions, I was able to get the motor to cut out 
> entirely.
>
> It’s funny, but I think I just mentioned a day or two ago that when we got 
> our new harness back in January of 2013 we had to build a mini-harness to 
> connect the main wiring harness to the FI harness. This is a picture from 
> 3.5 years ago of what we have so there’s no longer a worm clamp on the MPS 
> hose (which has been renewed several times) and the exposed metal on the 
> connectors has long since been covered with electrical tape
>
> http://images.thesamba.com/vw/gallery/pix/1503546.jpg 
> <http://images.thesamba.com/vw/gallery/pix/1503546.jpg>
>
> The interesting thing was that when I touched the electrical taped ends of 
> the black and white power wires together, the motor stalled. This may have 
> been our issue going back to last year!! Based on engine vibration and 
> whatnot, those wires could have been coming in and out of contact with 
> each other for a long time. Brief contact could be the miss and sustained 
> contact could be the motor cut out.
>
> For the short term, we routed the wires well apart from each other so they 
> can’t come into contact. However, we still have our original T2 connector. 
> I was thinking that unless there’s an issue with doing so, we’d snip the 
> male connectors off of our FI harness, use some butt connectors to install 
> a little bit more wire, fit some female connectors, and run them through 
> the T2 connector so they fit to the long male ends of our main harness. 
> Does this sound like a valid fix?
>
>
>
>
>
>
>
>
>
>> On May 11, 2016, at 2:52 PM, William J <catnine09 at dslextreme.com> wrote:
>>
>> These boots used to come with Bosch plug wire sets yet they were black 
>> and lasted decades . he first set I got came with 8 . They do tend to 
>> hang on the spark plugs yet easy to get them out with long nose pliers 
>> without wrecking them.
>>
>> William
>> ----- Original Message ----- From: "Jim Adney" <jadney at VWType3.org>
>> To: <type3 at vwtype3.org>
>> Sent: Wednesday, May 11, 2016 9:46 AM
>> Subject: Re: [T3] Mystery Miss
>>
>>
>>> On 11 May 2016 at 9:29, Jim Adney wrote:
>>>
>>>> The VW part # is 311 905 444A. I just called my dealer and they said
>>>> this is still a good number, but the price is now out of sight: $22.91
>>>> each!
>>>
>>> I just discovered that if I leave the A off the search, I get a lot
>>> more hits. The price comes down to $16 or 8 Euros (less than $9)
>>> each. Dave Hall might be able to buy some for 8 Euros in England and
>>> bring them to the Invasion. They're small, so not a problem to pack.
>>>
>>> -- 
>>> *******************************
>>> Jim Adney, jadney at vwtype3.org
>>> Madison, Wisconsin, USA
>>> *******************************
>>>
>>> _______________________________________________
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>>
>>
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