This is the second web page I'v seen reguarding this kind of info. I can't find the other web site that talks about drilling a Throttle body to fix IAC leaks.

http://para.noid.org/~lj/

I found this web site. Im wondering what you guys thing about the PCM Tutorials and the Split BLM's write up reguarding the AS&M 58MM TB.
Adjusting the Throttle stop screw to control Split BLM's?
Modding AS&M TB to fix leak in IAC port?
Is this accurate info? What are your thoughts?
How would I trouble shoot this on my current set up? I have a scanner that is showing my BLM's split, but I don't know where to start trouble shooting.


Second question is about Fuel rail set up. How important is placement and routing of fuel pressure reg and fuel feed and return lines?
I have seen many different fuel rail but Im not sure what will produce an even fuel pressure to both sides of the rail under all driving conditions. I leaning towards a dual feed setup with a single return. I want to make sure I place the retun line in such a way that the pressure on both Fuel Rails is the same.
Freds return is in the cross over piece while others are fuel rails only have 2 supply lines and the fuel pressure is regulated before it enters the fuel rail?
So what is most constant and accurate?