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

Jens Vagelpohl jens at type4.org
Mon Aug 12 15:28:00 PDT 2019

> On 12. Aug 2019, at 17:10 , Jim Adney <jadney at VWType3.org> wrote:
> On 11 Aug 2019 at 23:17, Jens Vagelpohl wrote:
>>> On 11. Aug 2019, at 22:46 , Jim Adney <jadney at VWType3.org> wrote:
>>> Did Type 4s ever get the pressure sensor with diaphram?
>> Yes they did, the D-Jetronic was used after 1969 on all fuel injected
>> engines. Only the 1974 model for certain markets like California had
>> the AFC L-Jetronic.
> But did any of the Type 4 D-jet cars come with pressure sensors that had the 
> diaphram, like our '70 and '71 Type 3s? I thought I heard someone on the 
> samba say that Type 4s never got that; that they managed to skip that step.

Maybe I am misunderstanding what you’re saying, but how could a system controlled by manifold pressure go without that pressure sensor? How could you “skip” that?

Needless to say, that engine has a manifold pressure sensor like all fuel injected Type 3s.


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