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Our old Corsa does that ... how pricy is it to have the ISCV cleaned?
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DIY job if you can locate it - no idea where it is on your Corsa - sorry. Remove and clean with some carb cleaner.
Hopefully someone will be along shortly with more details.
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Time to buy a haynes manual me thinks !
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far-on
If this is a three-cylinder X10XE unit; the idle is controlled by a flat black-plastic stepping motor bolted to the driver's side of the throttle body. It acts as a variable throttle stop and they often fail.
Before spending out any money; carry out a quick compression test to rule out a inter-cylinder leak through the head/gasket - these are very, very prone. [Sent two W-plates to the scrappies for that in just the past week.]
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Off the top of my head it's a 12v engine, My foggy memory is almost certain there were 4 spark plugs though.
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