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Mates Altezza Sick

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hi all. mates car has problem in the throttle body aera.when you bog the toe in it the engine dies but no lights come on. and there is a slight push back on the pedal. soon as you lift off again it comes back to its self but it looses sensitivity.when you do this with just the car ignition on you can hear something sticking on like a buzzing and does not release its self untill you switch the ignition off.any ideas what this might be.

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not really sure but I did experience once while doing a hard cornering and when the traction control kicks in, the engine just turned to idle but the throttle is in WOT.

However, after I release the throttle everything was back to normal as usual.

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An RS200 here in Oz had a similar problem. In this case, WOT throttle would lead to the car loosing power. You could drive it around, but if you gave it full welly, it would lose power considerably until it was restarted. A complete throttle body replacement was the only solution in the end.

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I assume the throttle bodyis electronic( as u mention a buzzing) but even on the IS the throttle body has a servo and that buzzes all the time - nearly all servos do that anyway. If you say something is sticking maybe the servo unit is malfuntioning, is the return spring ok?

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yes the return spring is ok. and we checked my car aswell and it just buzzes the same. when it cuts out it kind of pushes the pedal back to you come off it. and then throttel graduly comes back to normal again. but soon as you sink your boot down it revs to 5000 and cuts out.

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