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Hesitation S70

RE - 1998 S70T5

A few weeks ago I wrote in that I feel a slight "Hesitation" when driving the car on the highway at anything over 100KM or higher. (It might be there at lower speeds but I don't feel it.) I got a tune up and changed all wires and plus. It's still there. The cars still has lots of power and still flys. But the hesitation is still there.

Someone replied and said I should go to the dealer and have the ECU reprogrammed. Can anyone tell me what the ECU is and why this might make a difference?

Thanks

RickB






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