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My 370Z started to have the engine bay high-pitch sound. I traced it to the area of the ECU (or ECM = same damn thing). It reminds me of a
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09-06-2009, 11:34 AM
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#16 (permalink) |
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Join Date: May 2009
Location: Ohio
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My 370Z started to have the engine bay high-pitch sound. I traced it to the area of the ECU (or ECM = same damn thing). It reminds me of a high-voltage sound that is typical of electonic circuit boards that have developed a cold solder joint (crack). Once the board heats up enough to expand the solder the joint/crack gets temporarily bridged by the solder which then will cause a voltage disparity which produces such a high-pitch noise. Once the board cools off sufficiently to contract the solder the joint/crack sides move back into a gap shape which disconnects the flow of voltage in that joint which will cause the high-pitch noise to stop.
A batch of bad ECU boards may have made it through to Nissan which may have a weak spot which could allow a cold solder joint to occur over time due to constant expansion and contraction. Last edited by ZKindaGuy; 09-07-2009 at 10:37 AM. |
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