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1993 Mustang Cobra TPS Issue
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<blockquote data-quote="RunninHorse" data-source="post: 16378340" data-attributes="member: 197475"><p>An EEC failure can also cause constant 5vdc at the green TPS wire, but you'd have more than just a surging idle. </p><p></p><p>Have there been any recent changes to the car? When did the surging idle start?</p><p></p><p>It's worth running KOEO/KOER self tests. Even if the check engine light isn't on. See attachment.</p><p></p><p>In general, a base idle reset should help with surging idle. See attachment. I'd run codes first though.</p><p></p><p>Any tuner worth his salt should tell you not to try to tune it while there are any type of issues. Get everything fixed and all codes cleared first.</p></blockquote><p></p>
[QUOTE="RunninHorse, post: 16378340, member: 197475"] An EEC failure can also cause constant 5vdc at the green TPS wire, but you'd have more than just a surging idle. Have there been any recent changes to the car? When did the surging idle start? It's worth running KOEO/KOER self tests. Even if the check engine light isn't on. See attachment. In general, a base idle reset should help with surging idle. See attachment. I'd run codes first though. Any tuner worth his salt should tell you not to try to tune it while there are any type of issues. Get everything fixed and all codes cleared first. [/QUOTE]
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