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This pic is from my 1990 Samurai JL 1.3 SOHV engine.
What is it called and what is it's purpose?
 

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Darrell.
You are the man. I'm not sure how it should work, but during warm up mine pulses and I hear a pulsing noise of the air going to the Carb air filter housing. It that the correct response I should get from then ISC ?
 

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Looking at the diagram it sucks air from the filter box to the inlet manifold.These units do pulse rather than open/close like motor driven units, but I assumed it would do so fast that you wouldn't really hear it. To be honest it's been many a year since I heard a fuel injected Sammie. If she ain't broke don't try to fix it ;).
 
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