[kitch]

Well update time, I just finished the lower intake gasket on the 3.8L windstar. It ran excellent firing on all 6 cylinders for about 3 min from cold start. Then it started to misfire on #6 again. I could here a high pitched whistle but could not find it. I was pretty tired so I got pissed off and left it over night and started it again in the morning. Same thing happened but this time I listened for the whistle at the start and it was not there as soon as the whistle came the engine started to act up. I kind of pinpointed the sound to driver side just inside the wheel well. You can really here it from the wheel well but you really have to strain to hear it from the top. I looked all over and sprayed everything to see if I could make engine do something but nothing. I think it is a gasket because the engine runs great until it warms up a bit but where I do not know. Does anyone have an idea. I replaced IAC gasket, egr valve gasket, throttle body gasket, lower/upper intake manifold gaskets, valve cover gaskets, and replaced the fuel pressure regulator.