MikeZ Posted November 13, 2020 Share Posted November 13, 2020 Hi guys this one has got me scratching my head. I'm about to put in a Malpassi fuel pump and I've noticed there's a bypass solenoid between the inlet and outlet of my factory pump. It appears to be have been triggered from a now non existent water temp sensor (according to my original wiring diagrams). It's obviously going to be deleted, but I can't stop thinking what purpose it originally served? Can't find much online amongst the sea of fuel setups these have had. Perhaps my car once had a mechanical fuel pump and this was to bypass the electric pump once at operating temperature or something? No idea. Quote Link to comment Share on other sites More sharing options...
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