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Help please 2.5L hunting on idle

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Old 10 January 2008, 01:32 PM
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Brad WRX
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Default Help please 2.5L hunting on idle
Hi

Can any one help please, My mate has a 2.5L classic it is hunting on idle, we have tried countless idle control valves on it and every disconected the idle control and it still does it, it flutuates at from about 800 to 1500 rpm.
We are beginning to draw a blank as all pipes and hard pipes have been checked for leaks, it is also using more fuel than usuall,

Any advice will be very welcomed.
thanks
Brad
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Old 10 January 2008, 02:32 PM
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Possibly a maf related issue, if your sure there are no air leaks.
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Old 10 January 2008, 06:34 PM
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have you changed induction kit to a larger diameter unit and not change the MAF scaling?
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Old 10 January 2008, 06:35 PM
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sorry should have said, Mafless running autronic ecu
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Old 10 January 2008, 06:51 PM
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It needs proper mapping then.
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Old 10 January 2008, 07:00 PM
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it was running fine @ 460bhp and all of a sudden created this problem,
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Old 15 January 2008, 03:51 PM
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What AFR's are you getting at idle? I also have an Autronic PnP in my S202 and it only idles smooth at 13.0 - 13.5.
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