hmmm....-4 psi? WTF

[White7M]

i was wondering if anybodey new how the hell to fix the stock boost gauge, mines reading -4 when its just sitting there and when i punch it, it goes to 4 psi. thats definetly not right.. Any ideas???

 

[aye mate]

stock gauge is crap. mine wouldn't register boost til 5 psi. get an aftermarket gauge and be done with it. or if you really want to I'm sure you could get a new sending unit from toyota. that might fix it.

 

[MKIIINA]

thats normal. when its -4 its in vaccum and theres not positive pressure being generated by the turbo. after it starts to spool it will go up as you said to 4 (im guessing you have it in mmHg) get an aftermarket boost guage and youll be good to go in real time.

 

[Idealsupra]

the bottom half of the gauge is for vacuum...which is what your car is in until the turbo creates positive pressure. the top half is for the positive pressure the turbo creates.

yes the stock boost gauge sucks..but it still relatively works... if your only boosting 4psi then thats a problem...even if youre an auto it should be slightly higher then that...

 

[albertmdh]

yeah, my 5spd read at least 7 before i shimmed it, now it pegs it.

 

[blacksupra]

I have the same problem but I need to replace one of the ic lower pipes cuz it has a big crack

 

[Supra Blues]

It seems that everyone hates the stock boost gauge. Just get an aftermarket one.

 

[Blue87T(Dan)]

The stock gauge is slow to react by design. There is a mod to make it react faster but I can't seem to find it.

As has been stated, you're better off with an aftermarket one anyway unless you're running under 8 psi.