Also, check to make sure you don't have a dirty air filter. So many times we get customers calling in telling us they can not keep there car or truck running. We ask a series of questions to determine the problem. Most times when I ask !QUOT!How dirty is the air filter?!QUOT! I get responses like, !QUOT!Black, super brown...I have never changed it and have had the truck 6 months!QUOT! etc. This will defiantly make the engine run lean. So keep the air filters CLEAN guys