Vacuum at idle

[Fozzy]

Still chasing issues here - can anyone tell me what the vacuum reading at idle should be? My EBC is reading -8.5psi should it be closer to -10 ?

 

[Keadeen]

Just checked for you on my ej257 powered hawkeye.

Cold on start up - 1500rpm - -0.4 bar (-5.8 psi)

Cold a minute in - 1200rpm - -0.5 bar (-7.25 psi)

Cold 2 minutes in - 1000rpm - -0.6 bar (-8.7 psi)

Half way between cold and normal operating temp - 900rpm - -0.65 bar (-9.42 psi)

I suppose the idle control valve is responsible for the difference in vacuum.
Didn't let if fully heat up, but looking at the trend then between -9.4 and -10 psi at hot idle seems likely.

 

[Eoinmack]

Mines about -0.6bar also, but it's a prosport gauge, may not be 100% accurate like.
I think anyway, I'll double check there shortly and get back to you

 

[Fozzy]

Thanks man - appreciate that. Seems like I might have a leak alright - time for a pressure test so.