[T3] Bad day at the (FI) office

Mike Fisher fisherfarms at gmail.com
Tue Mar 15 21:23:02 PDT 2016


My prime switch button just broke off!

On Tue, Mar 15, 2016 at 8:35 PM, William J <catnine09 at dslextreme.com> wrote:

>
> ----- Original Message ----- From: "Daniel Nohejl" <d.nohejl at gmail.com>
> To: <type3 at vwtype3.org>
> Sent: Tuesday, March 15, 2016 6:46 PM
> Subject: Re: [T3] Bad day at the (FI) office
>
>
> Thanks, Jim! I look forward to the box of brains and the edge connector.
>>
>> I was wondering this evening about power supply both to the brain and
>> to/from the relay under the back seat. Perhaps I should also check the
>> ground and power connections there. But would intermittent failure of power
>> or ground cause the motor to stall or to blink/hiccup like it currently
>> does?
>>
>
> Yes the relay if it loses power or ground can cause the issues  you have .
> also connector T2 wire 16 and 24 shown on page 17 fuel system Bentley .
> That connector is between the relay and the ECU. The 69 wiring is not quite
> as well drawn out as later years. Yet it might be at the left side of the
> engine compartment toward the front of the engine near the vertical tin or
> so called fire wall. If you lose power to the ECU even for a second for
> whatever reason you lose the heart of the system. I'm not certain on a 69
> model but the later years had a brown wire off the power relay to the relay
> mounting screw. I'm sure you have studied the 69 wiring schematic both in
> the fuel section as well as the schematic and will see power off the
> starter as well as through a fuse. One is hot all the time and one
> energizes the relay to complete the circuit off the ignition switch through
> the fuse.
>
> AS far as the prime switch button goes , if you still have the ign warning
> buzzer I tend to use that by removing the buzzer , on a 69 use fuse 12 at
> the top of the 16 amp fuse . All that circuit feeds is the buzzer and to me
> is a great place to add a circuit to.
>
> William
>
>
>> I don’t know if it’s relevant, but I installed the fuel pump prime
>> switch/button on Sunday and we’re running the switch off the bottom of fuse
>> #8, the red 16 amp fuse for the wiper motor. Of course my issue exists even
>> with the wipers off, but I figured I’d put it out there in case using that
>> fuse sends up a red flag for anyone.
>>
>> We had little energy left for testing after work today but we found that
>> with the pedal floored, we’re maybe 10*-20* off from full throttle as seen
>> here
>>
>> http://www.thesamba.com/vw/forum/album_page.php?pic_id=1478218 <
>> http://www.thesamba.com/vw/forum/album_page.php?pic_id=1478218>
>>
>> I pulled the cable further through the barrel clamp and now it’s 100%
>> open though I’m at the last bit of metal on the cable end to clamp down on
>> before the cable itself. If it matters, this is the same cable the car came
>> to us with 4 years ago and for all I know it’s original to the car. I’ve
>> yet to examine the throttle Bowden tube or anything else.
>>
>> I haven’t driven it yet and won’t be taking it to work tomorrow as I
>> can’t afford to be late in the event of an issue so this is where we’re at
>> for now.
>>
>> Daniel
>>
>>
>>
>>
>>
>>
>>
>>
>> On Mar 15, 2016, at 6:00 PM, Jim Adney <jadney at VWType3.org> wrote:
>>>
>>> Okay, Daniel, 2 more brains are on their way to you. One is an A
>>> brain, rebuilt by Bosch into a CU10X, which I assume means it was
>>> rebuilt into a B. The other one is a B. Both were tested by me, but
>>> only to the same degree as the one you already got from me.
>>>
>>> The Post Office expects to deliver on Thursday.
>>>
>>> Packed in between the 2 brains is a piece out of the edge connector
>>> of another B brain, in a tiny zip lock bag. Use it to like a feeler
>>> gauge to check each pin in the brain connector on your harness. Pay
>>> special attention to these pins:
>>>
>>> 16 is the 12 V power input for the logic
>>>
>>> 11 is the logic ground
>>>
>>> 24 is the 12 V input for the injectors
>>>
>>> 3, 4, 5, & 6 are the outputs to the injectors
>>>
>>> The connectors that carry the highest currents need to be the
>>> tightest. Those would be 3, 4, 5, 6, & 24.
>>>
>>> If you find any of these to be loose, you can carefully bend the
>>> connector pin with a small tool, to tighten it up slightly. Be
>>> careful, don't overdo it.
>>>
>>> --
>>> *******************************
>>> Jim Adney, jadney at vwtype3.org
>>> Madison, Wisconsin, USA
>>> *******************************
>>>
>>> _______________________________________________
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>>>
>>
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