hey guys, this afternoon i changed my oil, oil filter and fuel filter, fixed up some bad earth wires from battery to the body and tried to install turbo timer, when i went to start my car it fired up find and the turbo timer worked as well, after rechecking the oil level i went to drive the car and as soon as i hit boost the car broke down really bad, i putted home and let it idle and it was fine but as soon as i revved it it starts missfiring really really bad and backfires extreamly loud sounds like gun shots, i think a bit of oil got on the first coil pack so i took it off and wiped it off as much i could and cleaned where the plug sits, i left the car for a while and unplugged the turbo timer completly and went for a drive it started missing again but only on boost so i kept off boost and tried to go back home then all of a sudden it misses all the time now i can even take off with out it breaking down and backfiring really loud, i think it mite be a leaking injector or a few but not sure how to find out, its undrivable cause as soon as i touch the accelerator is breaks down and pops, my fuel gauge has gone down 1/4 tank and i only done about 5km but had it sitting there idling a for 20 min or so. is there any way to confirm leaking injectors or what? i dont wanna have to take em out and find they are fine, any one else had the same problems? sorry for the long post and help would be great thanks.