My s2 starts but wont idle, it sounds like its running on 3 cylinders n has no compression what so ever. When it starts n i put my foot down it keeps running but is really lumpy and pours blue smoke out the back???

NE1 know what could be the problem?? I have a spare engine i was going to put into it but would like to know if the problem is repairable first??

NE Help appreciated, Cheers

 

have u done a compression test? when i start my frst if the pipe for the map sensor has come off that sounds a bit rough like its running on 3. was it fine 1 day and then u went to start it the next and it was like this?