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Power Strokes
7.3 Tech
Check your alternators!
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[QUOTE="907DAVE, post: 345537, member: 672"] Recently I have been experiencing some shifting irregularity's and some idle stability issues when shifting between reverse neutral and drive, as well as a randomly flashing O/D light. I was able to retrieve a P0720 (output speed sensor) from the PCM and with the truck in park the speed sensor would fluctuate wildly (viewed from scanner). First thing I did was measure the charging system for A/C voltage using my DMM and there was around .3vac. Threw the scope on it to get a visual.... [ATTACH=full]87336[/ATTACH] Anything above .2 volts A/C should be considered a problem. So I installed a new rectifier and everything is good to go. Keep this in mind next time your truck is acting up. [/QUOTE]
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