Just had regal stage 3.5 software on my car. Runs fine when driving normally but when you put your foot down it bogs out and splutters at about 5000rpm.

Spoke to regal about the problem and they seem to think its caused by over boost. But sometimes it doesn't boost at all I have had the boost tested and it boosted to 1.5 Bar. Was told by regal it should be 1.2 Bar

I'm pretty sure the map is correct as I know a few people who have the same and it's fine. Been speaking to people about it but people keep coming up with different things.

A few things that keep coming up are Boost control Solenoid, and a faulty wastegate

Any ideas?

Any help will be much much apprieciated, Thanks!