Yes Guys the injectors were out, however all new O rings when it went back together. By the way the engine was apart 18 months ago, and was running ok till a few weeks ago. Have monster headers fitted, and relocated the O2 sensors further away from the engine. Also no cats, and burns a little oil at start up. Will check O2 sensors as well, as read also if they have a build up of gunk can cause surging. Will keep you advised. Thanks again for all the info guys, cheers Ern.
