Just wondering if I have my vacuum hose for my bypass valve tapped into the correct location. Right now, the truck will make a small amount of boost, but does not want to go above 4-5 psi...and also seems very quick to get back to vacuum.

Currently, the vacuum hose coming off the bypass valve is T'd into a line coming off of the stock fuel pressure regulator. Is this not the ideal location?

Is it ok to tap into the vacuum line coming off the top of the EGR "flying saucer" looking piece next to the throttle body?

Thanks!

 

The absolute best source would be to tap into the upper intake. That's what I did for my bypass valve and it works very well.

 

If you tap off of the EGR valve after the control solenoid you will not get a vacuum signal unless the PCM is commanding flow. If you follow that vacuum line till it gets to the control solenoid you can tap up to the line that feeds it. If you look for the fitting that feeds the brake booster there should be a second nipple on the throttle body hat feeds the other vacuum lines. tap into that. As for the 5psi; Is the belt slipping?

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here is how mine is hooked up, right after the Throttle body

 

The control solenoid is the black plastic cylinder to the left of the EGR valve correct?

Is there anything specifically wrong with having my bypass vacuum line T'd into the fuel pressure regulator? Is it less than ideal for some reason? Just wondering because there's no point in changing anything if there's nothing wrong with it.

Thanks

 

Here is what the fuel pressure regulator does. It allows fuel to return to the fuel tank. The more vacuum in the system the more fuel that is allowed to return to the tank. That lowers the fuel pressure and volume. When you go into boost the vacuum disappears and the fuel pressure and volume spike to the maximum that the fuel pump can produce. If you are running the bypass off that line. As far as the regulator goes more vacuum means less fuel. That is not a problem because boost is loss of vacuum. So the regulator shuts and spikes the pressure. Too much fuel is a lot better than not enough. If the bypass valve looses vacuum it will shut because of the spring and you will have compressor surge. While it is a PITA you can limp to the side of the road and fix that. So for all intents and purposes you could tap into the fuel pressure regulator and suffer no engine damage because of it.

 

Gotcha, thanks for the explanation. I mean, is it worth moving it somewhere else to get a better vacuum signal, or should I just leave it tapped into the FPR how it is since it won't hurt anything?

 

i t'd into the vacuum line that feeds the brake booster and it works great

 

Same here..... used a fat hose to my Vortech Mini race.

 

Reading obviously wasnt a strong piont for you in school was it? This is the second post i have read that had absolutely nothing to do with the topic. Just in case you missed the question is was, what is the correct vacuum source for Procharger bypass valve.

To the question i have always tapped into the fpr for the vacuum source and that is where mine is now.