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Message: [QUOTE="reilly8282, post: 841183, member: 6827"] Just a little update, I went ahead and pulled the valve cover off and ran the truck, just to check for blow buy or an audible pop from the intake side. When I pulled the valve cover off, I found nothing, no cylinders acting any different than the rest while running with the valve cover off. Then I went ahead and pulled the oil rail off. I checked the oil rail nipples and they were all pretty tight, it took a lot to move them around so I assume everything was normal and no oil was making it past the actually oring. I checked all the bridges and rockers for anything odd and didn't find a single thing abnormal acting, all plastic rocker arm guides were intact and in place. We turned the motor over a good 20 seconds and I watched every rocker go through its cycle and without actually measuring actual lift they all seemed normal. Here is the odd part, I put everything back together and cranked it up and the noise was gone. I drove the truck for three days without a tick whatsoever. Then the third day when the truck got up to temp I could hear the tick and everyday since then it has gotten audibly worse. I am lost! I have the new style two piece stand pipes, would it be possible that the spring/valve on the drivers side head is acting funny, or not opening all the way? I am reading 27-30 IPR% and about 650-700 ICP readings at warm idle. Wide open I can read 3500+ icp pressures on a stock tune. But could a faulty valve standpipe valve still cause the ICP to read high while starving the drivers side injectors from full oil pressure? Any help appreciated, I cant figure this one out. I still have my old style single piece standpipes, I am tempted to swap them out just to see if it makes a difference. [/QUOTE]