Astra F 1.6 1996 - Astra ICV

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Sat 1 Jan 2011 17:32
Astra F 1.6 1996 - Astra ICV - billleescott

Hello all I have a strange story to tell, got the usual issues with the ICV lumpy running and erratic idleing. Cleaned it ran ok for few days then engine managment light came on and back to lumpy, so decided to replace icv with a new one. On starting the engine with the new icv in place the idle speed was constant at 4000 rpm. Put the old one back in and the idle was 800 rpm. So got a replacement new icv put it in and again idle constant at 4000rpm, so put the old one back in now 800rpm but lumpy with loss of revs when under load. Anybody got any ideas.

ps The diognostics are 10-5 = idle control valve.

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Sat 1 Jan 2011 18:58
Astra F 1.6 1996 - Astra ICV - elekie&a/c doctor

It is possible that the drive circuit in the engine ecu for the icv is faulty.The original unit is stuck at 400rpm.A new unit cannot be controlled from its pre-set value of 4000 rpm.However this idle problem should not cause a power loss under load.May be an idea to get some diag equipt linked up to check operation of other sensors in the system.hth

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Sat 1 Jan 2011 20:01
Astra F 1.6 1996 - Astra ICV - billleescott

Thanks for that, it makes sence, when I say it looses power its more that it is starved of fuel then it gets a surge, also stalls at junctions. So yep you are probabley right it needs to go to a garage.

Thanks Bill

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