hi just got a 2000 reg 1.2 16v corsa and got it for my lad who as just passed test and i knew it had problems, got it cheap, 49000 miles, it does not start so took top off and checked spark, thats ok, checked fuel thats ok, did compression test but gauge hardly moves across all 4 pots, same reading wet and dry, im guessing timing, can chain jump and throw timing out to the point that hardly any comp regs on gauge, any help would be great, thanks