Hi i need some help with my octavia im new to owning this and its playing up.

I have a bunch of history since 2014-2015 and i saw it had been remapped, but i have an ongoing issue with lack of power now/ not boosting

 

 

ran fine when i got it, started out as a intermittent problem if you turned the car on and off it would boost properly again, but now won't boost i get about 5 psi. 

Please can someone help me i have tried changing the N75 Valve and Dump  valve but nothing seems to be curing it, all the pipes have been checked no splits in any pipes.

 

 

Grateful for all help recieived thanks Chris

Fixed it i unplugged the maf then plugged back in turbo working fine again!

Hang on. Did you run it with MAF unplugged? So you know that MAF is at fault? Otherwise all you've done is turn ignition off and on again - maf unplugged or not - which resets limp mode back to normal, as you've already done. I suggest a scan as you need to find why it was going into limp mode, a code would have been logged. Unless of course you definitely know it was a faulty maf...

Yes i ran it with maf unplugged it made no difference but when i plugged it back in the boost worked fine again so i think its the maf

And the consensus is get a genuine Bosch one from TPS or Skoda...