98 e300 White smoke

[apwcu]

I recently picked up a 98 e300 with 175k miles. The car slowly started to show more white smoke and air bubbles in the fuel lines. I went ahead and replaced the prefilter and all of the lines with new mercedes ones.

Now, the car starts fine but has a steady stream of light white smoke at idle. When you hold the throttle at about 2500 rpms it puffs a large amount of white smoke out. I watched the new lines while revving it and the one line from the lift pump to the SOV has air bubbles at anything above idle. How is the air still getting in? Is there an oring I missed somewhere?

Thanks

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