Last night my car performed well at 15psi in 1st, 2nd and 3rd right up to the red. However in fourth on full boost the car became very hesitant and started to jerk slightly as though it wasnt getting enough air or fuel...

 

I then pulled over and opened the bonnet, the car was rough idleing and had some smoke coming from area where i think one of the turbos is (near the bulk head, drivers side).

 

I let the car run for about ten minutes and the smoke ceased and the revs settled.

 

Does anybody have any ideas about what was going on....???

Whar colour was the smoke and what did it smell of?

it was dark out and the smoke was very light so i could not tell the colour although i would say possibley blue, and it smelt of oil

i have also noticed that when the car does it, my boost guage fluctuates up and down...

 

i thought maybe could it be my boost controllers "overboost" function?...?...? what do you reckon?

bit hard to say until if becomes a fully developed problem,when was the last time you have your car serviced?

april of this year

Where did you get it serviced, the thing is it could be a whole range of things, and since it only appeared when you gave the car some beans it is sounds like a intermittent problem.