What can cause this

 

Is it boosting to 1.5bar?

 

Fluctuates from 1.0 bar 1.5 and its like you keep putting.foot on and off accelerater

 

So you can feel it? I.e. its not a duff gauge? Split vac pipe? My car would over boost due to a split vac pipe and when it did it would fluctuate quite a bit. Either way don't keep booting it if its over boosting.

 

I have changed all vac pipes induction pipe
And changed intercooler and everything to do with vac system

 

 

Another video
I am at wits end with the car

 

Hi mate I had the same problem on my x reg classic a few months back. I cleaned out the boost solenoid with carb cleaner by connecting the green connectors under the dash with the ignition on but not the engine. The solenoid should be clicking, mine wasn't so I took the pipes off and sprayed into it. It started clicking after it was clean. Problem solved!

It has started doing it again now so I'm going back out to clean it again!

 

I have replaced boost solenoid with another one
Second hand one mind ya

 

Any one else
Need help

 

Get it cleaned out