I was hoping someone might point me in the direction of what I can check on my engine. My car has noticeable smoke while in a warm idle. But here is my issue... I performed a warm compression test (at WOT 'Wide open throttle' and 8 second counts) this evening and my results are 195 psi on all cylinders except cylinder 3. Cylinder 3 is 185 psi. I'm happy with the results, a little wear, not bad for a car with 213K miles. Does these results alarm anyone else? I just did a turbo upgrade last week from my T25 to a 14B, I had the smoking problem before the turbo upgrade and I have it still. The turbo I purchased was spose to be 'oil burning free', so I hoped the oil seals were good. I will perform a boost leak test on the turbo inlet this weekend to check for leaks, but is there anything else I can check? On my T25, when i performed a boost leak test, I had air coming from my valve cover, I could hear the oil bubbling through the oil pan so I assumed the oil seals were bad. It was a good enough excuse for me to upgrade, no regrets. If the oil seals are good on the turbo.... where else can I check? To check the oil seals, my plans are to: Perform a boost leak test on the inlet side of the turbo, if I notice air coming from the oil pan and valve cover again, I will perform a boost leak test at the Throttle body to see if my results change. I'm pretty sure it's not coming from my PCV valve, but I will watch out for possible leaks at this point. Am I on the right track? Any advise would be greatly appreciated. Thanks, Joe Added information: If it matters..... I have a new full exhaust system that I'm getting use to, the CAT converter was removed and replaced with a test pipe. Can the added smoke in idle be due to the test pipe? I'm still getting use to the upgrades made within the last 2 months.