crashed svx idles rough and stalls

[Mr Hide]

hi I had a accident in my Svx and was hit in the left hand front gard afterwards I drove off road and was running a bit rough , I've now got to dealing with it and when I try start it it will fire and idle extremely rough for 5 seconds or so before stalling any ideas on the problem, it sounds like possibly a timing issue although if checked the belt and its sweet