smudgeits

hi my problem started about 4 weeks ago stopped at out of town garage fo fuel 1 mile later engine check came on engine stalled but started again drove it home but realy spluttery put some fuel treatment in tank still no good check light intermitant have changed plugs coil packs cat even tried differeht ecu went to main dealer no faults recorded check light is now present on first start up but turns off when car reaches normal temp on gauge car will run fine for a while then splutter again but then clears itself and goes okay just cant trust it realy so not driving it at the moment by the way its a1997 2.0 turbo any ideas?