sorry for any spelling or any other mistakes 1st time using the forum. i bought a Civic Type-R 2005(55) it starts fine when cold in the morning but after about 10mins it'll start heavy misfire it would't hold the revs and it'll cut out if i try to accelerate i would'nt rev it pops and misfire badly. check engine light was on and it said camshaft pisition sensor i bought the car like that thinking its jus a cam sensor fault should be an easy DIY repair but it was'nt. changed the sensor but the problem was still there got the oil & oil filter changed new spark plugs, checked coil packs but nothing helped. then a mechanic told me it could be because of streached timing chain then i got the timing chain and tensioner replaced problem still there changed crankshaft sensor, knock sensor, opened the throttle body cleaned the idle control valve, but the problem is still there. car had sports exhaust manifold and decat. i put the standard manifold on it and the standard cat on it but still the same. i even took it to honda but they can't find anything. They said the only thing they can think of is that the timing is wrong. i took it back to the mechanic who done the chain for me he opened it again and done it again . by the look of it timing was ok camshaft pullys got markings on it and it was spot on. any idea wat could it be? any help would be great.