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Re: Where to reference boost with rising rate fpr?
It should be hooked up to the intake manifold where it will see vacuum and boost. You have to unplug the vacuum line from the FPR to actually check/set your base fuel pressure. The fuel pressure is supposed to change with different amounts of vacuum. There isn't vacuum on the i/c pipe side of the throttle bodt, so you don't want to use that as a source.
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