can i put adjustable actuator on and keep my hi lo boost setting,
Wouldn't even think about raising the boost unless you get a new fuel pump, most of these cars are getting on a bit now and generally are still on a stock fuel pump which will be tired.
Its not just the pump that becomes tired, the wiring on these cars is also dated and can corrode or split, meaning that your left with less voltage at the pump that ideally what you would like. It is worth checking the voltage when replacing the pump. A tired fuel pump is very much like an engine, the more miles you put on it, the less the rings seal against the bore, so you lose power. Especially with people increasing fuel pressure, increased fuel pressure means the pump has to work twice as hard to pump fuel to keep the rail under a constant pressure.
It is very important to replace if you are thinking of rasiing boost levels, although this can be picked up on a rolling road when checking the afr's. If the fuel pump is dieing you will run leaner and leaner, I think someone has posted before that when they changed a fuel pump the car ran really rich, so they had to get it remapped and they found out the afr's went down to 10's.
You would have to remove the pump from its housing, find it's feed voltage and its groun and just stick a multimeter across the terminals, with the ignition switched on. I'm sure someone would have a more technical picture of words lol.
I'm not too sure on tuning companys around Oxford or this area, but I would recommend JD modified in Basingstoke, its a 40 mile drive from Oxford so maybe a little more for you.
You would have to remove the pump from its housing, find it's feed voltage and its groun and just stick a multimeter across the terminals, with the ignition switched on. I'm sure someone would have a more technical picture of words lol.
I'm not too sure on tuning companys around Oxford or this area, but I would recommend JD modified in Basingstoke, its a 40 mile drive from Oxford so maybe a little more for you.