Hello, Had a stage 1 map put on the car this morning.
I have a forge recirc valve (Changed to yellow spring), ITG intake.
Since map I now have a flutter in power when under hard acceleration between 3,500-4,000rpm. It is fine before, and afterwards throughout the rev range.
Its running currently on tesco 99.
I have removed the forge recirc valve thinking its dumping too early but its not cured it...
anybody else come across this problem before?