not again - Alfa Romeo Forum
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not again

well just driven back from the lakes in the 147 (cant wait to get the gta on the a66) anyway just as i get to scotch corner services to start going up the A1 guess what happens....

Motor control system failure


seems to be running fine so i am hoping it is just the knock sensor AGAIN
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Join Date: Jun 2002
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Damn it,

Good luck & happy motering after ...
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Join Date: Apr 2002
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147 1.6lt

Silly question: whats the knock sensor?
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In simple terms it is device that detects vibrations in the engine with are generated when the ignition of the fuel is out of phase with the position of the piston stroke.If the knock senser detects this the information is sent to the cars E.C.U which will advance or retatard the ignition spark time. In most cars the knock senser is not active until 2000rpm has been reached. If the knock senser is faulty it can give false information to the E.C.U which can result in poor engine performance due incorrect ignition timing.

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