Originally Posted by Stu @ M Developments
That means one of 4 things then top of my head.
Pipe is blocked.
Regulator leaks to atmosphere.
Idle speed is VERY high already.
Idle content is so rich the extra air didnt allow the engine speed to increase.
1...Will check again before fitting new one.
2...Hold pressure from foot pump
3...Idle speed 800rpm
4...around 6% co at idle at the mo...need to trim that