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Bad Idle with 071's

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Old 13-04-2006, 02:54 AM
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Cosworth-PT
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Default Bad Idle with 071's

My stage 1 2wd idle speed is unstable with 071's. it keeps making "small" acelerations with a 100 to 200 rpm deviation. any ideas?
Old 13-04-2006, 04:16 AM
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snow*
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What have you gapped them to mate?.

From what I can remember....

0.70mm will give you a smoother idle but may be a little lumpy higher up the rev range.
And 0.55mm-0.65mm will be slightly rougher on idle but perform better higher up the rev range.
Old 13-04-2006, 01:46 PM
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Originally Posted by snow*
What have you gapped them to mate?.

From what I can remember....

0.70mm will give you a smoother idle but may be a little lumpy higher up the rev range.
And 0.55mm-0.65mm will be slightly rougher on idle but perform better higher up the rev range.
From what I've seen they (ford dealer) have installed them as they come, I mean didn't see them check the gap, removed each from the motorcraft box and pluged them I will have them out tonight and check
Old 13-04-2006, 04:44 PM
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As ollie said check the gap m8,mine are gapped at 0.7mm.
Old 14-04-2006, 08:11 AM
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gap them at a 45degree angle as well m8 as the earth electrod is very short if you gap them as per normal it wil be too large a gap. Im sure 1 of the nice people on here will have a diagram to post up for you

Stu.
Old 14-04-2006, 09:18 AM
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Old 14-04-2006, 09:28 PM
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^^^^ There you go.....aint passionford mint at being full of helpfull people
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