I've been having a problem with my gt ever since I put on my k24 turbo. the turbo had been put on and a few weeks after I was pulling out of a car park and the car started violently chucking, it'd drive in reverse and when it was idling there was no sign of a miss or when you held a rev on it. the engine light only flashed for a second and I still haven't checked that, but I took off an intercooler pipe and it'd drive without the turbo. I then was talking to a mechanic and he said he had come accross a similiar problem with an uno that when it was at normal running temperature that it would do the same and it turned out to be the lambda sensor, so after some time of the car lying up I changed that and it was grand for about 2 months until it happened again, I again changed the sensor thinking that it'd happened again because I hadn't got the car mapped yet, so after it being lying up again for awhile I changed the sensor again and again after about 2 months the same happened but instead i left the turbo connected and disconnected the lambda sensor and the car drove for about half an hour but started spluttering while i was driving so the next day I changed the sensor and it drove for about half an hour and it started the violent chucking when i was pulling away and i couldn't drive it. So now I'm back to square one and don't know what the problem is or was, I've done compression test and everythings alright, checked the spark plugs and on cylinder 1 and 4 they're normal but cylinder 2 and 3 are burnt a bit white as if they're a bit lean on them cylinders. But as i said I don't know what's causing the problem so if anyone has any ideas or has come across a problem like this and sorted it, your help would be appreciated because it's getting me stressed