I have had a slight miss while at idle with a P305 code. I did a compression test on all six cylinders today and here is the results.
#3 120 psi. #6 80 but drains to 0

#2 100psi. #5. 68 but drains to 0

#1. 135psi. #4. 105 psi

It's obvious that there is an issue with cylinder 5 and 6, but is it bad valves or what? I can't seam to figure this 3.0 out, any additional information will help me a lot

 

2003 3.0l should be minimum 140psi in all 6, expected is 165psi, so could be your pressure gauge is not sealing correctly