Quote:
Originally Posted by ThermionicScott
Just something with an oxygen sensor. If memory serves, none of the early stock VW systems had one.
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When it comes to CNG conversions, some folks refer to a single-point injection setup as "closed loop" and to multi-point injection as "positive pressure". Anyway, I'm not so used to those older EFI setups, but oxygen sensors were not so common at least until mid-'80s.