Hi guys i've got an A15 with twin 40mm webers. The prob i have is that it wont pull or rev. It used to rev to over 8K but then it developed a missfire. I found the fault to be a cracked dizzy, fixed that prob with a bit of nail polish but still replaced it with a genuine nissan cap (it's electronic. Think its same as n14). Well after that it was back to its old performance. now i'm having the same kind of probs it gets to about 4K rpm and gets a major flat spot and just wont pull, it will keep reving but takes a long time to get there. I have changed the plugs and fitted 10mm leads. Would this be a fuel prob? or maybe valve springs (it doesn't get driven often and has a very high lift cam). I'm not too sure about fuel as it revs freely when not under load but has the same fault in every gear (It should rev out in at least first gear untill the fuel bowls run low). Thanks guys sorry for the long post.