In the many months I have been enjoying this website, I have tried to help as many people as I could. I've had two questions on here for a few days now that I really need help with, but noone seems to have any answers. I know some of you all know about these engines. And I also know that some of you have modded yours including nitrous, superchagers etc. And I'm sure that fuel delivery on these motors were an issue. So you mean to tell me that none of you have ever hooked a hand vacuum pump up to your fuel regulator and applied a small amount of vacuum to see if the diaphram was good or not? That is the correct way to check it and you are supposed to watch the fuel pressure guage to see if the pressure drops 3-10 lbs, which mine does. But it is not clear in the manual whether it is supposed to hold the vacuum that you apply. Vacuum is just dropping off real quick. Which to me would inducate a bad diaphram, but I'm not sure. Come on guys, I really need some help here.