[T3] Diagnosis help for a badly running 1971 VW 411

Keith Park topnotch at nycap.rr.com
Wed Aug 14 18:49:27 PDT 2019

ahh, yes, Full load enrichment,  the 2L 914 didnt use that, yep, folded back
under the boot.


Topnotch Restorations
topnotch at nycap.rr.com
71 Squareback  "Hothe"
65 Notchback  "El Baja Rojo"
93 RX7  "Redstur"
95 Chrysler Cirrus Lxi "Cirfogsalot"
"hanging out at the tail end of the bell
curve, and loving every minute of it!" 
-----Original Message-----
From: type3-vwtype3.org [mailto:type3-vwtype3.org-bounces at lists.vwtype3.org]
On Behalf Of Jim Adney
Sent: Wednesday, August 14, 2019 11:18 AM
To: type3 at vwtype3.org
Subject: Re: [T3] Diagnosis help for a badly running 1971 VW 411

On 13 Aug 2019 at 17:09, Keith Park wrote:

> some T4's got the fuel cutoff, the 2L porshe did not however and my 2056
> doesnt have that.  Stinks like a skunk on deceleration.

If you're responding to my question about the 5th pin on the TPS, that pin
for full load enhancement. All our Type 3 TPSs have an idle pin for shutoff 
on overrun, but I know it wasn't connected to the brain in all markets.

Do you know which years of Type 4 D-jet engines came with a 5 pin TPS?

Decades ago, I worked on a '72 Type 3 that had been brought back to the 
US from England. While working on it, I discovered that there seemed to be 
no functioning idle contact. I eventually discovered that the 5th wire to
TPS was folded back under the boot. I installed it in the connector and was 
then able to adjust the TPS correctly. It wasn't until a number of years
that I found a note in the Bosch literature that said.

*Not installed in all markets.

Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA

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