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thats exactly how a boost gauge works mate....below 0 is vacuum up to 0...then anything above that is displaying the amount of boost being used.....i have aftermarket gauge in psi and thats a lot more accurate from what i have found to stock gauges

is it normal that b4 i start the car pic1 turbo gauge showing 0- zero

and after car is running its going down pic2 but only to -0.6

month ago it was before i start a car in -1 and after -1 now it changed

is it a problem ??

thanks guys

Like most have said, it's normal for it to sit at 0 (atmospheric) when the engine is off, and for it to go negative when idle (the motion of the engine literally sucks air into it).

However, if the amount it goes down has changed and you haven't done changed anything (pod filter, boost controller etc), then you might have a leak. Does it still make the same maximum boost? (stock on the 34 is just over 3/4, or half way between 0 - 1) Does it hold that boost if you hold your foot down?

Like most have said, it's normal for it to sit at 0 (atmospheric) when the engine is off, and for it to go negative when idle (the motion of the engine literally sucks air into it).

However, if the amount it goes down has changed and you haven't done changed anything (pod filter, boost controller etc), then you might have a leak. Does it still make the same maximum boost? (stock on the 34 is just over 3/4, or half way between 0 - 1) Does it hold that boost if you hold your foot down?

i will check it and let u know but i think i yes its hold that boost.

i recently bought my skyline and i think its time to go to mechanic for inspection

will check my boost and let u know

thanks

just check it

working okay

its in 3/4 when hold foot down

thanks gosh no leaking

P.S. noticed another strange thing, sometimes boost gauge is stopping working (like the engine is turn off) anybody no how can i fix it ?? is it wire or gauge or what

thanks

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