Boost is dropping

So I have my tune and eBoost 2 booked for the 22nd, but I'm concerned that maybe something more sevre is going on. I've now noticed that I'm only getting around 4 pounds of boost as opposed to the stock 7/9 pound I was previously getting - which is opposed to the 10/15 I used to get (but that went a while back).

I was thinking my boost gauge might just not be reporting it properly, but I just checked it and all is connected fine. But then I also thought, the flutter is *noticeably* quieter which is a sure sign (I reckon) that there is less boost being produced.

I was thinking that maybe it is the boost controller (seeing I already think it'sscrewed), but boost controllers are not meant to be able to reduce maximum boost only increase it. So I guess that cancels that out.

So then I wonder if it is something with the exhaust. I did get the catalytic converter installed a while back, and I'm also thinking that the car is sounding quieter (exhaust wise), so I wonder if maybe that has got clogged up.

And I guess worst case would be the turbo has shat itself, but I guess it could also be that the intercooler is blocked up (maybe with oil) and as a result there is pressure building between the turbo and the intercooler stopping from being able to build boost. hmmmm, but then potentially the intercooler piping would pop off.

I really don't know. The only thing I'm sure of is the lack of boost and the quieter flutter. I'm not 100% sure if the exhaust is quiter and not sure about anything else. I guess I'll remove the boost controller sometime (damn it, busy tonight) just to be sure that is not it, and then maybe I'll have to change the tune to a diagnose and tune and maybe hold off on the eBoost 2.

hmmm.... maybe I should just ring now and mod the appointment... no point changing the system until I know it is working (or not working) 100%.