John,
The branch-off to the fuel pressure sender should be as close to the
carburetors as reasonably possible, as the purpose is to measure the
"in-pressure" to the carbs. One easy place is where the fuel line to the
right side carb branches off. Here is a T in your installation, I assume.
Replace this T with an X (a four-way cross), and connect the sender to the
fourth outlet of this cross.
If the sender at present is connected to the tank return line after the
restrictor (I assume you have a 912/912S), no wonder your EIS does not
register any pressure. The restrictor causes a significant pressure drop.
The restrictor sits inside the return line, just after it branches off from
the fuel line going to the left carb, if done according the Builder's
Manual, and is not visible from the outside.
Svein
LN-SKJ
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