Gents looking for some info on what to check.
The car drives fine from cold and even after 20mins or so into a journey, the car boosts fine to the redline in all gears. However, after about a 30 - 45 mins drive it seems to hold back slightly (2 shunts) from 5K RPM to redline.
If I turn the car off and on again (i.e. petrol station scenario) and it's still warm, it boosts fine again for a short period of time before I get the hesitation again.
Any ideas on what could be causing this.
Car is a 94 TT6 BPU running 1.2 bar. Coilpacks (new Whifbitz ones), spark plugs, coilpack clips, boost pipes have all been checked and replaced.