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Vibration At Idle, Low Performance And More Fuel Consumption

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GS300 SE MKII 1998, UK Spec.

Just after Engine steam Clean: huge vibrations at Idle, Rev Counter jumps up and down between 400 – 800 rpm, low performance, and more fuel consumption. Vibration causes whole car to vibrate.

It was fine before Engine steam Clean.

I think I need to clean, throttle body or Oxygen Sensor or Air flow Sensor?

What shall I do? Please help.


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Try cleaning all the plugs and leads, distributor cap,[if you have one], water in somewhere is tracking HT away.

Spray the whole lot with WD 40 to displace any remaining water.

Or blast the lot with an air line.....leave the bonnet open if you can to evaporate any water.

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