vacuum issue?

[tromspert]

Hey guys I'm not sure if my gauge is reading wrong or what is going on. At idle I sit at about -20 in vacuum, it normally used to sit at about -10 but when I took it out it behaved normally, my gauge only ever hit 5 but the rear end went sideways like it was at about 10. I have a ct26 in 57 trim turbo currently. I'm sorry if I posted this in the wrong category as I'm not entirely sure. Otherwise it seems to drive fine. My car is a 2jz swap, wow how could I forget to say that

 

[suprajim54]

At idle, my vacuum gauge reads about -16-18inhg on my 7m. -20 should not be a problem. Does the car run better than when you showed -10 at idle? Did you have a massive vacuum/boost leak that was fixed? What did you do that suddenly caused the change?

 

[tromspert]

The only thing that changed was its about 20 degrees colder in here. I mean it pulls almost exactly the same so maybe just the gauge acting up? I don't think my rear end would be kicking out from under me at 5 pounds instead of my normal 13 its set to. Otherwise its behaving normally it seems. I have a 2jz BTW guys.

 

[Dylan JZ]

a stock 2J should be pulling around -19 to -24 or so in/HG at idle unless you have cams or a leak. I pull -15 now on my 1J, but that's after installing 272s.

 

[tromspert]

a stock 2J should be pulling around -19 to -24 or so in/HG at idle unless you have cams or a leak. I pull -15 now on my 1J, but that's after installing 272s.

Okay turns out I has a map issue as well but she's staying at about -21 vacuum wise