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<blockquote data-quote="MG0h3" data-source="post: 15563168" data-attributes="member: 164690"><p>If you hadnt have said "high" voltage I would think your ECM is losing power. You cant load tunes and can actually damage the ECM while transferring files and the batt dies.</p><p></p><p>Have you checked for power at the ECM while the failure is occuring? Not sure if the OBDII port is powered on the same circuit as the ECM; Id check at the harness.</p><p></p><p>Whats weird is it sounds like the problem corrects itself. PCBs can get hot and fail but Id look for something simpler. Relay or not sure if there is a circuit breaker on the ECM power circuit?</p><p></p><p>Another thing Im curious about; it only does this under heavy load? If its heat related, you should be able to stop and go in traffic and recreate it.</p></blockquote><p></p>
[QUOTE="MG0h3, post: 15563168, member: 164690"] If you hadnt have said "high" voltage I would think your ECM is losing power. You cant load tunes and can actually damage the ECM while transferring files and the batt dies. Have you checked for power at the ECM while the failure is occuring? Not sure if the OBDII port is powered on the same circuit as the ECM; Id check at the harness. Whats weird is it sounds like the problem corrects itself. PCBs can get hot and fail but Id look for something simpler. Relay or not sure if there is a circuit breaker on the ECM power circuit? Another thing Im curious about; it only does this under heavy load? If its heat related, you should be able to stop and go in traffic and recreate it. [/QUOTE]
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