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engine:vacuumrouting

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Vacuum Routing

Vacuum routing is slightly different between certain model years (and US/UK models). Most of this is US-centric information.

Vacuum Solenoids

Fuel Pressure & Ignition

There are a pair of solenoids mounted under the intake plenum for fuel pressure and ignition. Lotus refers to these as part #A910E6634F.

I took some time to test and investigate these solenoids (they are identical parts, but serve two different purposes).

These solenoids are a German Pierburg part (#7.12942.00) they are not necessarily an easy part to find (right now, sourcing one is more than $50 USD each).

I tested the solenoid to see the internal routing when energized and when not. The solenoid switches between connecting the top outlet to the bottom-side outlet when energized, or connecting the bottom center outlet to the bottom-side outlet when NOT energized (polarity doesn't matter).

engine/vacuumrouting.1746706141.txt.gz · Last modified: 2025/05/08 12:09 by 114.119.132.57 · Currently locked by: 114.119.147.32,10.179.80.163