changed my ecu to a chip ecu on s1.car was running 8psi of boost on standard ecu put on the chipped ecu now only running 5psi all gears did not change any thing apart from ecus still running amal valve put on old unchipped ecu gone back to 8psi chipped ecu came of a s2 running 14 psi no problems was told s2 will run s1 and i must admit seen it my self on the track .....wtf have i done wrong

 

take it to a tuner - Sounds like it only running off the actuator and not the amal valve. might need to use a bleed valve. Take it to a garage, put a -31 actuator and bleed valve on and get them to set it up for you at 15psi

 

sounds like im going to have to run a bleed valve but why the drop in psi on chipped ecu

 

Just read the origianal post!!! You can't put the ecu from a S2 into a S1

Did you put it a S2 ecu into a S1?? Bit confusing up there

If so I think one of the reasons it won't work is that it won't have the knock sensor!!! It is operating in a safety mode kind of thing and won't be using the amal valve which electronically controls the boost hence you are only getting 8psi from the actuator!!

Take it to a tuner

 

You have to set the boost on the actuator and in turn, you need an ECU with the boost limit removed and in turn, you need the fueling set up for your new boost limit....

Take the car to a tuner.

If it is an S1 then run an S1 ECU (blue red blue colour code, or a blue red white will do which is from a very early spec S2).