I posted this before and got some good answers but the intermintent miss cleared up and the truck has been fine until now...Always drops #7 cyl whenever. Compression is good,new fuelpump and filter,recent tuneup with everything. Seems to loose #7 when the tank is low. !/4 or less. I know it's the poppet valve on the end of the fuel delivery line in the intake,but why does it seem to do this ONLY when the tank is low. I'm going to replace the whole spyder assy. with the updated version as soom as I can afford it. Also will running the truck this way do any damage? The cyl. is just starved of fuel. It's a 305 cu in. 265k