Don't know if anyone can help but i've got a 04 reg Corsa 1.0 Life and\nwhen i turn the engine on it ticks loudly and has done for a while. But\nrecently when i start it up and rev it, it dips unexpectedly and when i\ntake my foot off the gas it makes a sort of scratching noise.\nAlso it's undrivable because there's hardly any power at all. It revs\nnormally but won't go anywhere. I can be doin 4500rpm in 2nd and it'll\ngo no faster than about 20mph and it's sluggish, like when old cars\ndidn't have the choke out far enough when they were cold.\nHope that makes sense to someone, just wanted to try and get everything\nin! Hope someone can help me out!