HELP! I own a 1994 1.6i 16v Escort. Just had some minor welding done for MOT(floor near sill/seatbelt fixing)both sides.Disconected +side of battery.The car was lifted up at rear about 20 degrees so my mate could weld it from underneath.Since then I have been having problems with tickover,sometimes engine hunts below 1000revs,sometimes cuts out.The car drives perfect apart from this problem.Any help would be appreciated.