My mate has just put c20xe into my corsa b, when he started it, it was idling at 1500 rpm, he got it idling at about 1000 rpm and took it for a short drive. it seemed alot better. He then started it up again afew days later and it was idling at 1500 rpm again!
Anybody got any ideas or know what the problem is?
I would go with the ICV sticking open, take the pipe off the air box and squirt carb cleaner down, leave it a bit, then wd40 to lube the valve, then start the car and it should chuck out any gunge sticking it up.
i take it you aren't getting any ecu light on.
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