boost dropping

[FourG63GST]

Im using a hallman mbc

I get on it...and the boost goes up to 1.0bar then drops back down to 0.5bar really quickly like its spiking.

Any idea why its doing this?

 

[DSMeclipse4G63]

welcome to america we use standard....there are many factors that could contribute, 14b's are great but they are also getting very old and even in good shape sometimes fall off. what rpm does it start to fall off? the turbo does start to run out of breath on the high rpms, but they tend to be able to hold at least 15-18psi depending on condition.

 

[FourG63GST]

As soon as it spools up it just drops right back down. It seems to be spiking. And GREDDY gauges use Metric units.

 

[WSU99GSX]

Boost leak...?

 

[97GS-TSpyder]

check your boost fluid

 

[FourG63GST]

check your boost fluid

Thank you for your very helpful post! :thumbdown