Revs sit between 2000/3000rpm in neutral

[jacobboxall96]

This last week my corsa b has been high reving when I put it in neutral and then the temp gauge will be on red any ideas?

[johnny]

Temp going to red quickly is common in the corsa on hot days, easiest fix is to bridge the fan to a manual switch, it's what I've done in my own

Do the revs drop if in gear and coasting?

[jacobboxall96]

Yeah the revs drops if your driving slowly the go back up when stop and foot on the clutch

[johnny]

Only thing it could be is sticking cable or idle control valve

What engine is it? What happens when it's in neutral, if normal does the revs go up if clutch is engaged?
If you rev it in neutral do the revs stick

[jacobboxall96]

1.4 p reg corsa sport after about 5 minutes of driving when i put in neutral the revs stay above 2000 and if i rev it it will stay at about 3000


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[johnny]

Yeah common issue of the sports icv, you could try cleaning it but there awkward to get at so if it was me I'd just replace to save having to take it twice

[ukhozi]

Had that too, a few times, change the ICV, cooling wise I have replaced the pump, rad, hoses and gaskets and skimmed the head, that cured it,.

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