Thread: Newly rebuilt fe390 still smoking after intake redo. Leak Down Test? Wrong pcv valve

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I am really not wanting to introduce cleaning products into this engine at this time. Especially after reading a lot of negative comments about doing so. I do appreciate the tip though as it might be fine to do. Old remedies like this can work wonders at times when other methods fail. I am having to modify a rubber tip to use to do a leak down test since the spark plug holes on these motors are so huge. It won't be til later this afternoon that I can see if anything can be found by doing this. I am so ready to get this behind me but love the challenge at the same time. I really don't want to break the motor down again so hoping there is another way to figure out and solve this problem.

I just ordered a replacement from an original FE390 so I will take care of that.