For some reason my 300CE runs much better when I have added some Techron fuel system cleaner. The car starts much faster and seems to have a better idle. Also it doesn't start then die like it would do on hot starts. I have treated it with Techron before but after I had run it through it went back to the same starting and idling characteristics. Would this be indicative of a fuel system that is excessively dirty or is the Techron actually making the engine run smoother?

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1989 300CE