the cap & rotor was purchased from M.B. However I had'nt thought about a leak around the injectors. I will persue that ave also this problem came on very sudden. That is why I was thinking some sort of clog. Also do you think I can add the cleaner in a stronger dose? Say on bottle to maybe 1/2 or 1/4 tank of fuel? I'm also using Amoco premium fuel. Thanks Ed