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TPS Issues


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So i was trying to adjust my tps.. the input voltage I'm getting is 4.19 and output voltage is 0.74 i replaced the tps sensor and getting the same exact reading with the new one i recently cleaned the throttle body and sensor ground seems to be fine the truck idles kinda ok but every now and then i can hear the idle dropping a little or picking up a little its not I'm guessing it should idle a little smoother than that don't think i have any vaccum leaks last i checked..so from what i read on the tps adjustment my numbers are completely off any ideas what could cause me to get those readings..possibly both sensors are bad?

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