my 4.6 has a bad miss when Im driving, like when im in like 3rd gear at low RPM and step on the gass peddel hard I get a bad miss fire. I have checked the compression and did a leak down test every thing was ok. I did a vac test on it and had a stedey neddel cant rember what it read. so no vac leeks. Any ideas??? OOoo and no code are present.