Idle control valve
03-08-2018, 08:34 PM
big jc
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Idle control valve
I'm need some help with my idle control valve. I've just replaced it and it revs up to 2k?. Thanks Jim
04-08-2018, 08:19 AM
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It may be an air leak, Does it still rev to 2k with the wiring plug to the iscv disconnected?
04-08-2018, 08:35 AM
big jc
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No it sits at 850 900 when unplugged
04-08-2018, 09:53 AM
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I had this and I bet it's aftermarket?
The issue is the springs are not the correct type/tension.
Martin
04-08-2018, 12:38 PM
big jc
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I have 2 old 1s and they did the same thing.
04-08-2018, 01:12 PM
big jc
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I have replaced the throttle position sensor (2wd)
04-08-2018, 01:14 PM
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Have you checked its output?
Martin
04-08-2018, 01:15 PM
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04-08-2018, 01:21 PM
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Yep, it should be open circuit at idle (this is what activates the idle strategies) then with opening it should read like 4.7V, decreasing to 0.5V @ WOT.
You can just unplug it and see the difference (if any).
Martin
04-08-2018, 05:12 PM
big jc
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Yes I set that up. Can't get it perfect when shuts it's spot on When open it's off by .1
06-08-2018, 10:27 PM
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That won't make any difference, as there is a tolerance.
It being open circuit is important, though.
Martin
07-08-2018, 07:21 AM
big jc
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The 1 that was on the car used to make the car judder trying to pull away. This 1 there's a tiny judder but 100s of times better. To cure that would the settings at full open should be bang on or when it's closed.
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