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Thanks for the help boys it was a vac leak.

Personally I'd run it open loop if you want to get the idle better. Otherwise the overlap will induce a false lean reading which will eventually peg the LTFT at +25 and spit fuel out the pipe. Make sure you retune the overlap SD adder tables at high overlap as well to help the PCM have a better starting point.

Cheers Roland. I'll give it a go. I've also had a car from another shop do the same thing. So I'm keen to get it sorted

Sometimes it is just the simple stuff! Definitely recommend a smoke machine if you work on boosted cars regularly.

Maybe fouled plugs? I would check the long term airflow and fuel trims before and after also. The computer might be getting confused with the false lean idle and making it run excessively rich. Try turning off long term fuel trims and see what happens as an experiment.

There is more to it than that. Firstly you need pro to get the file in the first place. Also you need pro to flash the ZF. Then if you merge you need workshop as there will be thousands of parameters in workshop that you won't be able to see. You could just blindly flash the entire file with pro but you may run into diff/gear ratio issues if they aren't the same. Finally if you have modules that don't match you'll be stuck with a check engine light and non functioning ABS. If this was the case you might need Ford IDS to reprogram it. Definitely recommend you pay a workshop to do this for you. This sort of stuff is a headache to do which is why I doubt anyone will touch it for under $600