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#1
07-07-2008, 12:41
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Right, had to take the boss home as he's ill, so got another chance to see if the misfire is still there and it is.
Sub 2.5K rpm and only on light throttle. Slightly heavier acceleration, it sometimes hesitates very slightly then revs cleanly. Does it whether engine is cold or up to temperature. It's had new plugs, HT leads (8.5mm magnecor), dizzy cap and fuel filter. Drives lovely on the open country road, but is annoying to drive through town, still induces big grins, specially as it raining 
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#2
07-07-2008, 13:04
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if its low rpm maybe an inlet manifold air leak? usually when the turbos boosting sufficiently it masks small leaks. try having the engine idle and spray wd40 around the manifold, if the revs rise its an air leak in the vacinity of the WD40 spray.
maybe split in hose from AFM to turbo, again maybe slight so that its being masked when boosting?
__________________
 Racing is life. Everything else, before and after, is just waiting. - Steve McQueen
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#4
10-07-2008, 06:39
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It's definatley an air leak!
Tried the WD40 trick, but struggled to hear the rise in rpm, did notice it running slightly smoother though, took it for a trip down the shops and it drove lovely, on the way back it start misfiring again, so I know what it is just need go back and do another WD40 check. Not sorted yet but not far off. Good call chaps!
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#6
11-07-2008, 10:16
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if all else fails - try cleaning your hotwire in the MAF
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#8
29-04-2010, 14:21
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Be good to know if this got sorted and how as i have the exact same problem as Irmdave. Missfire at idle and on light throttle upto about 2500 rpm.
Have change plugs, leads, rotor arm, dizzy cap, coolant temp sensor and still no luck. Was thinking dropping resistor as have heard about similar problems with these on the s13 but not sure if the s12 has one? Any help would be much appreciated 
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