i have an 02 s-type 3.0 with an intermittent misfire. I started off with p0306 cyl 6 misfire. I switched the coil from cyl 6 to cyl 2 and the plug from 6 to 4. After a short road test I got p0304 - cyl 4. I replaced all of the plugs and now have a p0305 for the opposite bank on cyl 5. My fuel pressure is reading steady at 38psi with little or no fluctuation relative to the misfire. I am having a hard time finding a voltage spec for the mass air flow but when it is unplugged the misfire issue basically disappears. Another thing that might be normal with jag but is not quite normal for what im used to is the fact that when i go w.o.t. in either park or neutral my rpm's are not rising above 3000 and the vehicle seems to bog down. Any help would be greatly appreciated. I would like more concrete means of testing the mass air flow before i replace it.