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300CE-24 High Idle
Hi All,
I am the owner of a 89 300CE-24 5-speed with ASR! Anyway I have the not unfamiliar problem of a high idle, ca. 1000-1200, when in either neutral or park. This issue is often attributed to a faulty IACV. I have eliminated this as by testing the unit outside the vehicle and when voltage is applied the unit moves to the relevant positions. Following this I tested whether the IACV was receiving any power which is was/is not. Next step was to check the throttle position sensor or throttle valve switch. Having followed the KE-Jetronic throttle switch tests, see here https://www.youtube.com/watch?v=s9WjaO61QyI, I have found that my TPS sensor is broken, as when moving the throttle the resistance does not change when measuring across pins 1-2 and 2-3 as in the video. Now I am stuck what to do. Should I replace the sensor? Is this easy or hard? Any advice appreciated, Friedrich |
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