I am certainly no one hit wonder. I for one have shared the very experience of having a problem with Bosch 4's. And I'm pretty familiar with the other problematic nuances of the engine. I go by factual and tangible data such as the computer read out. All I know is this.....Bosch 4's will never be placed in my engine as long as I have a say in it! The positive gainful attribute of having these type of plugs accomplishes little or no betterment for the vehicle anyway. Yes, they cost $4.00 more but so what. I bet that anyone who has these plugs can't really say a whole lot of diferrent from what my vehicle is doing. Now the E3 plugs are a whole special animal. I honestly don't know what these are/do. Some one please explain...... <img src="/forums/images/graemlins/confused.gif" alt="" />