Ok I fitted rev d diverter valve a few weeks back and the car has never felt so punchy. All was great until last week the power seems to have died off a little.
I'm assuming I have a boost leak somewhere and have read by unplugging the MAF sensor and driving the car you can tell if somethings wrong.
I've proceded to unplug this have have taken the car for a spin and the power seems to be back up a little, the car hasn't thrown up any error lights on the ESP light which has confused me a little.
Is the MAF sensor way a good way of testing?
Any ideas?
Thanks
