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Preventatively Replace ECU? 900

posted by  spook on  Wed Jan 4 19:18 CST 2023
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last visit: Fri Oct 24 08:06 CST 2014
[RELATED]

Dear james_a_sousa,

Hope you're well and stay so. I also hope New Year has started well and only improves!

Before accessing the Engine Control Unit (ECU), disconnect the negative battery cable clamp from the negative battery terminal. This cuts power to the ECU before the connector is removed from the ECU.

As to pre-emptive replacement, I'd have on hand one or two "known good" units. So, when the car runs smoothly, swap in the potential replacements, and drive for a day or two. If the car runs smoothly, note on the in-swapped unit: Good as of [date]. Store in a cool, dry place.

Hope this helps.

Yours faithfully,

Spook






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