Thanks for all the advice guys, I probably should have put a little more information in my first post, the car has brand new plugs in it, leads look ok, new air filter. I've cleaned the throttle body/intake and checked all parts are moving ok. The hesitation only happens when going from no throttle to any amount of throttle, ie. foot completely off the pedal, then applying any amount of throttle from that point will cause an initial hesitation. Once the hesitation has passed the engine revs freely and feels fine until you take you foot of the throttle. It also doesn't matter what RPM you are at, going from no throttle to any throttle causes the same issue. It is also idling rough when hot, and sometimes after about 25 minutes of driving, if I turn the car off, then back on again, it won't idle at all, it will just die instead of idling, but again, still runs fine otherwise.
That vsv/solenoid has two lines coming off it already, one at the side and one at the bottom. looking at diagrams I got the impression they normally only have two lines? I figured that the top part would have been a filter or cap, and have tried plugging it and seeing what happens but there is no difference. There are no open hoses or taps on the throttle body/intake.
One theory I have is that the TPS is buggered so it doesn't detect the initial movement of the throttle, causing the butterfly to be quite open before it thinks I am giving it any throttle, is that a possibility?
Cheers
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