[T3] ? on dist drive

[William J]

 What about pin 17 ? There are three wipers or slidding contacts . One that 
that runs on 12 and 14 and 17 . On decell the forked switch is the contact 
on accel the forked switch position contacts for the full load .

 17 only goes to the park position pad only when the throttle is closed and 
the forked switch contact . It must have something to do with the idle and 
14 as the throttlle closes has to have something to do with the injectors 
shutting off . If the injecotrs do not shut off on decell then wouldn't the 
fuel still be injected and cause un burnt fuel to burn in the heat of the 
exhaust.

 Like I said they were real loose and once I fixed that now it accell's much 
better and it no longer pop's out the exhaust. That explains the enrichment 
yet I did not have the throttle open that far .  When I had the terminals 
out on 14 and 17 and put them on the TPS terminal they belong on they would 
come right off just from the slight pull of the set in the wire.

 I just find it odd that suddenly after tightening the TPS terminals the 
popping out the exhaust no longer happens. All the other FI terminals needed 
to be tightened yet were no where close to as loose as 14 and 17 .
----- Original Message ----- 
From: "Jim Adney" <jadney at VWType3.org>
To: <type3 at vwtype3.org>
Sent: Tuesday, August 16, 2016 7:06 PM
Subject: Re: [T3] ? on dist drive


> On 16 Aug 2016 at 16:06, William J wrote:
>
>> I've also been trying to find any info on just
>> what pin 14 on a late E FI system ECU does.
>
> Pin 14 on '72-3 cars, E brains, controls full load enrichment.
>
> On '68-9 cars, A & B brains, this function was done by the pressure
> switch.
>
> On '70-1 cars, C & D brains, the pressure switch was eliminated and
> this function was taken over by the new diaphram in the C pressure
> sensor.
>
> In '72, the diaphram was eliminated and the function was taken over
> by the TVS, on pin 14.
>
> While the functions were the same, the various brains probably dealt
> with this differently.
>
> Note that the instructions in the Bentley for adjusting the TVS are
> correct ONLY for '68-9. Correct adjustment of the later, 4 and 5 pin
> TVSs requires either the Bosch tester or an Ohmmeter. Late
> replacement TVSs, however have an internal stop that makes manual
> adjustment possible, without instruments, but the only way to know if
> you have one of those is to open it up and look. Then you have to
> know what to look for.
>
> I have a writeup on how to adjust each generation of the TVSs. Email
> me if you want a copy.
>
>
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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