my ep82 gt turbo is misfiring pretty bad and the person i bought it from says its possibly the piston rings or the 3rd piston melted. he didn't do a compression test on the car and just thinks it could be piston rings etc, it seems to start up fine and idle fine just a major misfire all the time. Just wondering whether its worth fixing the engine thats in the car atm or just go ahead and find a replacement 4efte, haven't got a huge amount of money to spend budget is around 600 700 pounds...