Hi, I have a 52 reg expert 110 bhp 16v engine and have just replaced it for a 110 bhp 8v engine out of a 56 reg. I was hoping to be able to use the ecu but the fuse box loom is totally different so I have has to keep the 16v ecu which runs it fine but I have a couple of issues. I just can't get a good brake pedal. It is very spongy and takes ages to stop me. Also the turbo has stopped working and has thrown up and erg fault on the diagnostics machine. The 8v has only done 20k and was driving perfectly fine before hand as was my 16v which had done 285k hence why I wanted to change it. Is my problem vacuum related, could the issue be with running the 16v ecu. Has anyone ever done this conversion before? I don't fancy changing the loom but it would be the only way to run the 8v ecu. Also the 8v has abs and my 16v doesn't. I'm just wondering if the ecu's are set up differently in regards to vacuum. Any help would be gratefully appreciated. Everything else seems to be working fine.