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Astra Mk4 GSI
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Hi everyone,
Does anyone know if it's normal for Z20LET throttle bodies to shudder slightly when throttle is completely open? Also seems to make a static/electric noise. The pedal feels slightly lazy/delayed when engine is running.
We've tested the throttle body sensor wires, throttle pedal wires and pretty much every other engine related wire, and can't find anything wrong. Also changed the throttle body for another one, which made no change. Any ideas? I'm quite new to this so not sure if I'm worrying over nothing. Thanks in advance

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The noise is fairly normal, doesn't appear to be huge amount to worry about there. Is it effecting the way the car drives?
 
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