Started to stall!

[coey 4.2]

Hi all, got the old girl back from the spray shop, now gleaming but unfortunatly the guys managed to completly shag the battery, so off to Halfords to get a new one no problem
Got it fitted thought i'd take it for a spin and nearly straight away it's stalling at low revs hot and cold,is there any obvious reason for this to happen it was perfect before it went to the paint shop.
Any thoughts would be appreciated...

[arebrec]

worth checking the big fuse, some of the symptoms I had when the big fuse went was stalling at low and also high revs.