What sending unit is this?
On the 7MGTE's thermostat housing there are 3 sending units. The top one is the BVSV with 2 vacuum hoses going to it and there are 2 other ones below it with a 1 wire connector on them. What is the middle one for? The one that is completely inline with the top radiator hose. What is the bottom one for? I know on the engine side of the thermostat housing has the cold start injector time switch and the ECT sendor. Im guessing the bottom one is the temp gauge sending unit, but what does the middle one do?
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