new to forum....new to superchargers

**BoostedComp** · 02-12-2010

Originally Posted by SDGTP99

It's simple. If the boost bars flicker back and forth between say one or two bars that's a sign of knock. If the boost bars stay lit up or don't light up at all thats a vacuum leak. See, its still a useful gauge

soooo the lights now show how much timing you have? since knock pulls timing... and not boost... i dont understand how this would make sense? and ill admit ti could be useful for finding vacuum leaks but thats about all i see its good for well and a light show for people to go oohhhh ahhhhh lol

**SDGTP99** · 02-12-2010

Originally Posted by BoostedComp

soooo the lights now show how much timing you have? since knock pulls timing... and not boost... i dont understand how this would make sense? and ill admit ti could be useful for finding vacuum leaks but thats about all i see its good for well and a light show for people to go oohhhh ahhhhh lol

I know it's not really a reliable way to diagnose car problems. for that ppl should take thier cars to a mechaninc

**Bio248** · 02-12-2010

i will never take my car to a mechanic. ever.

**monsterjam5000** · 02-12-2010

i checked for vacuum leaks and found nothing, but when i unhook the t fiting on the supercharder where the two vacuum lines come together my boost would read full, when i installed the t fitting it will only get to half boost.

**Bio248** · 02-13-2010

your BBV is stuck open.

**monsterjam5000** · 02-13-2010

boost bypass valve right? wheres it located? how do you fix it?

i searched and found nothing about location or how to fix it most threads i found talk about why you should no delete it. nothing on how to fix it.

**Bio248** · 02-13-2010

you can run it vacuum controlled and disable it. take the lower vacuum line off the solenoid (it looks like a mushroom top with a lever going into the blower case) and leave it open to the atmosphere. you can then just cap off the line at the fuel pressure regulator.

**ZR1Vette09** · 02-13-2010

the light gauge shows up to twelve bars. That's roughly equal to 174 psi. I'm boosting so high!!!

**SDGTP99** · 02-13-2010

^^^so if stock 7ish psi gives us an extra 40hp then it will now get an additional 995.385 give or take a few numbers?

**monsterjam5000** · 02-13-2010

what thats alot of HP's hahaha, so unplug the vacuum line coming from the t fitting the the mushroom looking thing and this will have no cons to it?
are there any pros to doing it?

heres a pic is this right

**Bio248** · 02-14-2010

the cons to it are that the car will no longer be able to cut boost under torque management or a couple other times.

i believe you have it right, i dont know how the stock vacuum line setup works since i never had one for the l67.

**monsterjam5000** · 02-14-2010

cut boost under torque management or a couple other times

what is this under torque management?

also i thinks it tcs the button next to the boost gauge, well mine is always off the tcs off light is on and when i push the buttom it never turns on, i think the buttons broke,
could this be causeing my problem, whats tcs for

**badbrad** · 02-14-2010

look for a blown 10 amp fuse under fuse box under the hood. may or maynot be it. is ur abs light on too? torque mag. is to keep from breaking the trans/safety feature for trans.

**monsterjam5000** · 02-14-2010

yes abs is on as well

so should i unhook the vacuum line?

what else could i do to fix the problem the right way?

**SDGTP99** · 02-14-2010

Could be that or a bad PCM or a bad engine ground

**silverstreak** · 02-14-2010

Originally Posted by monsterjam5000

yes abs is on as well

so should i unhook the vacuum line?

what else could i do to fix the problem the right way?

You have a bad wheel bearing.

**monsterjam5000** · 02-14-2010

ya i thought that, i found some other threads talking about the same thing but what can i do to fix the boost bypass valve the right way not just unhooking it.

**silverstreak** · 02-14-2010

Originally Posted by monsterjam5000

ya i thought that, i found some other threads talking about the same thing but what can i do to fix the boost bypass valve the right way not just unhooking it.

Just replace it with a good used one but the method that was mentioned previously will be fine