[T2] Using a later FI system on 75 bus?

[Greg Potts]

Hi Mike,

I’ve run a 2L vanagon FI setup on my 1.7L EA engine since around 2008. I logged almost every fuel fill and tracked milage regularly. it doesn’t run rich at all. . Last year heading to High Country Bus Festival fully loaded i saw between 18-22MPG (US Gallon) . 

The L-Jetronic airflow meter measures airflow and the ECU delivers fuel accordingly . With a smaller engine draws less air so the ECU shortens the injector pulse and  maintains proper air/fuel ratio. It might become a problem for someone with a 2L motor using a 1.8L FI when they hit the rev limiter at 5500 rpm but honestly: if you’re at that rpm for a sustained duration you probably will have other issues to deal with.

You need to swap the throttle body, wiring harness, ECU and AFM as a set to make it work properly. VW added and remove a sensor at the throttle body and in the process they changed the connector at the AFM.

PM me for more details and i’d be happy to tell you what i know.

Happy Trails,

Greg Potts
197x WestFakia “Bob the Tomato”
Toronto Ontario Canada


> On Jun 15, 2018, at 11:47 PM, MUTS <muts at verizon.net> wrote:
> 
> We have a 75 bus that needs a FI harness replacement (cracking, wires to connector to double relay goofed up, bus won't start due to this we believe) and Kyle Automotive Sp will make it for us $100 more than the 76-79 ones.  Has anyone switched to a later than 75 FI system from a 75?  Do you know of where I can ask if someone did?  The 75 has a 6 pin connector to the Flow Meter while the later ones have a 7th pin for the temp sensor in the airflow. There is a unique connection to the air distribution box (throttle) that detected full throttle, or was it an EGR system no longer attached?
> 
> The "brain" is unique also- and a later one I have or can find more easily.
> 
> We worry about getting any spare replacements such as the Air Flow Meter or the "brain" unique to the 75; the later ones are more available.  Advice accepted.
> 
> 
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