Anyone know why a rs turbo would be an absolute pig to start? u turn it over and over and it starts on the 1st go kinda thing puffs an chugs but don't stay running.

However if u tow start it as your olling it will start but if u try and press the accelerator it kinda suffocates and cuts out. Starts up again but it do't likt to be rev'd until its warmed up abit and then goes straight away no problems.

any ideas? Theres no air leaks and once its running, it runs fine and doesn't stall or anything like that once it warmed up and started running for a few mins