Is the car behaving the same now as it was before the ETM was swapped out?? If this is the case then I would suggest fault codes need reading to confirm if the accelerator pedal position transmitter is playing up.
Also a check around the inlet manifold for leaks especially if the replacement ETM was fitted without replacing the gasket, spraying some easy start around the outside of the ETM with the engine running should indicate a leak exists as the engine speed will increase if it can suck the easy start through a gap - Mike
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