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I read an old post talking about, and I'm paraphrasing here, connecting the vacuum line from the base of the rear throttle body (the one that used to supply the AIS pump) to the test port on the fuel pressure regulator.It was supposed to smooth out the idle and boost mileage. I was wondering if anyone had heard anymore on this setup and the long term testing reports.


Many subsequent posts seem to indicate a lot of members were doing this some years ago, however the posts seemed to turn against it later, for example: http://rswarrior.com/forums/t/17240.aspx


Its been so long since I removed my AIS I can't remember the specific steps, and I'm reading the FPR was connected to the AIS so it must have been (I'm not where I can check). However it seems logical the FPR needs to have an unattached port to regulate fuel pressure based on air pressure, so why was it connected to the AIS stock?
 
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