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The mkiv Supra Owners Club

Hesitation from 2nd turbo on auto kickdown


AndrewOW

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By the looks of it, it was ignition. I've had a loose live terminal connection for ages now, and now I've fixed it firmly, it seems to have done the trick.

 

I only use 97 or 99 fuel now, and overall the car feels a lot better and is pretty economical too. I may get the O2 sensor cleaned at some point, but I don't have any issues with the glorious 2nd turbo boost now. :)

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loose live terminal has nothing to do with the car boosting or turbo

 

Of course it does. If you retard or advance the timing it has a MASSIVE impact on boost. Not having any spark due to an intermittent live terminal would pull the ignition at certain points causing massive hesitation and misfiring.

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loose live terminal has nothing to do with the car boosting or turbo

 

It would if the loose connection affected the ignition causing a weak spark that would basically get blown out by higher revs/boost pressure.

 

 

 

 

And what Scott said :)

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