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Message: [QUOTE="firehunter, post: 655801, member: 1162"] OK folks, I need to resurrect this thread. Even though it has been a couple of months since the last post I am still having this issue and it may be getting a little worse even though the weather is getting warmer. We might actually hit 70 degrees this week! Here is what has happened over the last two months: After doing a search I was able to find multiple members here that have had or still have this issue. Most of those guys have 160 - 200cc injectors with stock to 100% nozzles. All of them have different tuners. Some have changed tuners with little effect on the smoke. Others have changed injectors and had the smoke go completely away even with the same tuning! I have had several emails back and forth with Matt about this, referred him to this thread to see golfer's comments, and he made some tuning adjustments for me to try. No joy. Same volume and color of smoke - although it is very definitely white smoke. With no SES light, ever, and adjusting tuning not making a difference it was on to check mechanical stuff. New fuel filter, new air filter, new ICP sensor (was leaking anyway), new clutch and did bellowed up-pipes at the same time so no leaks there, new IC boots all the way around. Turbo is a new unit within the last year and it checked out today - no wiggle in the shaft, spins freely. Did a compression test on it about an hour ago... 1) 380 2) 360 3) 370 4) 365 5) 370 6) 380 7) 380 8) 365 After I figured in the correction factor for being at 5,000' elevation (as per the compression testing thread in the 7.3 tech and FAQ section) all the compression numbers were between 418 and 441psi. That is only a 5% difference between highest and lowest cylinders. I believe I can rule out compression as being "bad" and contributing to the smoke. Put a straight edge on the injectors and they are all level - just like when I installed them. Only new observation I can think of is that it starts "differently" every time it is cold. Sometimes it cranks for a couple of seconds and fires right off, like normal. The next time it will crank longer and kind of stumble it's way into a low, muffled idle, then normalize. Next time it won't start at all so I shut off the key and try again - it has taken up to four cycles before it fired off and when it does it produces a huge cloud of white smoke then normalizes. The relative no start has happened when the engine has been up to operating temp so it's not because of the GP system. What now? The HPOP and IPR are original 214K mile pieces. Is it time to start pointing a finger at the injectors (after 15K miles)??? [/QUOTE]