Vacuum

[Yoda]

What's your vacuum at idle? Just want to see what every one else has.

[cali yaris]

Hmmm, I'll have to check tomorrow.

[Blown_xa]

-21 inhg on a warm day

[cali yaris]

^ Pretty sure that's why he posted in the Forced Induction forum.

[Blown_xa]

^ Pretty sure that's why he posted in the Forced Induction forum.

yup

[cali yaris]

-17

[johnny_vitz]

15-17 on start-up...20-21 once its warmed up

[Yoda]

Ok thanks I ordered a new boost gauge and just wanted to see what I should be expecting in vacuum. Previous gauge did not have that.

[Blown_xa]

some things which can affect vac reading at idle... electrical load, afr's, and aftermarket cams. a stock, healthy motor is about -20 inhg. If you see -17 warm with ac off and proper afr... do a leakdown test.

[cali yaris]

If you see -17 warm with ac off and proper afr... do a leakdown test.

That's normal on my car.

[Yoda]

mine is about -23 inhg but still trying to figure out why my idle afr is soo lean. I am making a boost leak tester right now to see if i have a leak. And also my idle is rough bouncing all over the darn place 300-1000rpm.

[Blown_xa]

That's normal on my car.

strange, maybe your intake manifold has something to do with that. Last time I had vac that weak my piston ringland was cracked.

[Blown_xa]

mine is about -23 inhg but still trying to figure out why my idle afr is soo lean. I am making a boost leak tester right now to see if i have a leak. And also my idle is rough bouncing all over the darn place 300-1000rpm.

sounds llike a flakey primary o2, or exhaust leak before it.

[Yoda]

need alittle help. Is there another spot i can tee into for my new BOV? I want it to have its own vacuum/boost source. I am currently running everything off the intake manifold.

[pimp my yaris]

I had the same problem with the lean, bouncing idle condition. Some times it would even die out. I think the 02 sensor gets much hotter when located so close to the turbo. Also with the o2 sensor connected it will always be fighting the FIC and trying to correct. Now I only tune with the o2s dissconnected. My idle is still a little lean but much smoother and no die outs.

[cali yaris]

I put in a vacuum block, it makes it easy and very secure for multiple boost/vacuum lines.

I thought Golden Eagle made them, but I can't find it on their site.

Here is one from Full-Race:

http://www.full-race.com/catalog/images/vacblock.jpg

[ilikerice]

^^holy monkey balls.. didnt know they made those..

[Blown_xa]

I put in a vacuum block, it makes it easy and very secure for multiple boost/vacuum lines.

I thought Golden Eagle made them, but I can't find it on their site.

Here is one from Full-Race:

http://www.full-race.com/catalog/images/vacblock.jpg

I found some.... hehe....... http://www.ptuning.com/html/Item-Desc.cfm?PartNo=PTP%2DENG%2D90001&MakeCode=%2Dall&ModelCode=model&ModelYear=All&ModelDesc=Universal%20Fit

[Bluevitz-rs]

You can make you own on the cheap too if you only need a couple of ports. Just go Harbor freight tool, get a small manifold for a compressor and some of those brass barbed fittings. Would probably run you 5-10$.