I've been down this road to many times. the dealers don't want to replace the injectors unless they have no choice to do so. I finally had enough of thier BS and just had a set of Dons sticks put in and a airdog to keep them happy. But now it seems I have another injector giving me issues with Dosen't make any sence except that it was fine untill I put the MP-8 on to try it out again and then I started having issues again. I'm going to run a grey bottle of Power service to see if it cleans it out before i do anything else. If not i do have one spare stick on the way encase i need to swap one out.