i plan to get my car dyno tuned really soon but am not sure if i should get a fuel pressure regulator or not..currently im i have a vafc and skunk cam gears..those being tuning tools..the thing is im told that i would need a fpr to lean or richen and vafc to do the other i forgot which for which..would i be okay with just a vafc..i want to get the best out of the tuning but my situation is im in ca and with either b&m fpr and gauge or aem fpr..id fail visual for sure..any input suggestions thanks