Boost reading -10 at idle

[Duttycook312]

My car was making around 23lbs of boost and now ots reading -11 at idle and when I do a pull it goes to 0 to -2 what could be the issue

 

[TyphoonFiST]

So there is no Boost?

 

[notaustin]

blew a boost pipe maybe?

 

[TyphoonFiST]

Ill put money its the Hotside hose to the Intercooler that maybe has blown off if any * Have you done any mods lately?

 

[Tonda-B]

At idle - with almost closed throttle - is minus boost value normal.

 

[TyphoonFiST]

At idle - with almost closed throttle - is minus boost value normal.

Absolutely *

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[gtx3076]

My car was making around 23lbs of boost and now ots reading -11 at idle and when I do a pull it goes to 0 to -2 what could be the issue

Right now the issue is you haven't provided enough information to get a decent answer.

 

[Ecmdrw5]

That’s with starting it cold with the elevated idle and is shows -5.4ish. Once it’s warm it drops to -10. Glowshift gauge is in inHG for vacuum.

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[TyphoonFiST]

Did you get a chance to inspect your Boost Hoses?

 

[M-Sport fan]

Even when still cold, and actually moving slowly out of my development @15 MPH mine is @~ -9.0 PSI or so, but yes, this with very light throttle pedal pressure on my part.

 

[SteveS]

Aren't you just seeing manifold vacuum at idle? You won't have the turbo spinning up any pressure until there's enough exhaust to make it turn.

 

[LilPartyBox]

That's totally normal. Ur seeing vacuum which will show as neg pressure