xxteenobesexx

Finally got my Setup running. I have noticed that sometimes the car's idle surges up to 2k revs. I believe that it is a sticking bypass valve. I have read that the stock procharger valve is kind of crappy. If it does surge, i have went to the valve and manually opened it a little bit and the idle has dropped.

I just want to make sure that my vaccum souce is correct. I am sourcing it off the drivers side of the intake manifold about halfway. If that is corrct, do I need a better BPV (i.e. proflo)?

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Kevin Blown 95 TA

What is this "Orocharged" you speak of?

Oh and I bet you are correct - your bypass valve might not be working or you got some other leak. Is there a vacuum gauge that you can look at or can you log your idle? That would be a good clue what is working and what isn't.

xxteenobesexx

Ive been lazy and havent plumbed the vac/ boost gauge yet (misplaced vacuum line and compression fitting.) This 0rocharger(lol) has been nickel/diming me, so no datalogging til i get a bit more funds.

I figured that I had it right, just wanted expert confirmation. Noticed that it doesnt surge as often in warmer temps.

Oh, my Blower is a lowly P600b, but I am happy with the seat of the pants feel. Havent really driven it hard yet though.

Thanks RamAir

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xxteenobesexx

UPDATE:

Installed the Proflo Surge valve, and verified that the valve was wide open at idle. Idle still jumps way up (over 2000) when the car is started, then it drops to about 1000 rpm after 30 sec or so. If I drive the car, it still idles high every time I am not under load. At a Stop sign/red light it stays around 2000. If I blip the throttle while in neutral, it falls down, but slowly creeps back up between 1500 and 2000. This gets worse as the car warms up.

The surge valve vents back towards the inlet of the compressor instead of into the atmosphere (as procharger designed). I tried venting into atmosphere, and the idle dropped, but the car lost power and bogged down.

I need advice as to what could be the matter. I am lost. I will attach pictures of my proflo installation for review, and can supply video and more pictures if needed.

xxteenobesexx

Vacuum Source


Pro-Flo Location


Where Vented Air enters intake Tubing.

97WS6SCharged

Your vacuum source is fine.

I had a similar problem ages ago. As I recall I ended up pretty much zeroing out the throttle follower table (I think that's the name). Basically set it to the same speed for all conditions. You should also check the IAC tables to see what they are set to.

xxteenobesexx

The issue actually turned out being a vacuum leak at the throttlebody plate. Runs like a dream now!

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Bigbadwhitey

Im going to have to check mine, it kind of does this too. It seems to fluctuate between about 800 and 1400 rpm successively. This looks like a great place to start!