I've been hunting down a lag in acceleration on the 733, and I think I've found the problem to be a lagging or sticking valve. I did a compression test yesterday and the results were not what I was hoping:
#1: 119
#2: 108
#3: 121
#4: 139
#5: 128
#6: 150

I did a wet test on #2 and it came up to 141. Looks like its heading for either a valve job or a part out/sale; pending the results of an emissions test.

You are really lossing compression because the most you want to see is 10 psi difference between cylinders.

Best of luck.