I'm trying to trouble shoot a rich mixture and was wondering if the b&m fpg (which attaches to the fuel filter) is accurate enough to detect changes when I disconnect the vaccum hose from the fuel pressure regulator, or should I fork over $$ for a fuel pressure gauge/fuel nut adapter combo that attaches to the fuel rail?

 

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Hi, I think its the same thing. Its on the same system, so it should function the same way. I had to trouble shoot a rich condition as well, and reffered to my gauge as well. do the basics, O2's first, electrical, fuel etc...