Hey all, first post.
I know there's been lots covered on this subject so I'll keep it short and simple. Car starts up, very rough and shudders and struggles to keep revving for the first 5 seconds or so, this only happens when car is cold. During this time it doesn't respond to throttle. Is this a case of cleaning idle control valve and AAC (I've already cleaned throttle body) or is this different as it has no throttle response? Anyone else have this issue with their rough starts? I have taken off and put back together the intake manifold so wandering if it could be I've not got the gasket on correctly and coolant is leaking into cylinders when it goes cold?