Quote:
Originally Posted by oldman
I can't see how the line is the problem it is a filter side breather there is a slight vacuum at high intake flow in front of the throttle body. If cracked, it can cause low speed stumble as it will leak air into the already metered air (post MAF). I have a LT1 but the system is similar.
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Sorry, I didn't see your post 'til now. It doesn't seem like it would cause such a big issue but I've seen vacuum leaks cause some crazy symptoms over the years. Maybe it wasn't the only problem but it has to be a major contributor. As I indicated earlier, I was still seeing the issue long after I stopped using Torco so that pretty much rules that out. The only other thing I changed were the spark plugs so that may have been contributing too. I'm back to full-power now with no hint of the problem on the big-end. That's the important thing.
--Cal