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Message: <blockquote data-quote="CC&#039;S95GT" data-source="post: 921686" data-attributes="member: 10547">I'm leaning toward the TPS. especially if it's the origional.The TPS is a rheostat just like the dimmer on the wall for your house lightsYou have a specific voltage going in and as you move the throttle body butterfly, the voltage increases and tells the computer how much fuel to add.Over time the TPS will get a dead spot where the TPS spends most of it's time. So it sends the wrong signal to the computer and you get the rpm spike or a hanging idle.It's easiest to test with an analog meter but it is possible to ck it with a digital meter if you go slow enough and watch the ohm reading  carefully.</blockquote>