Hi guys, another problem with p38, on idle it hunts quite badly, enough for it to try and pull away and rock the whole vehicle, also when driving at just under 2000 revs it really holds back and jerks whole vehicle quite violently if you hold those revs, all other rev range fine, all i have tried so far was to spray some easy start over all air hoses/ joints and manifold joints so find a possible air leak but did not make a difference, any help much appreciated