hi, got vts, its running very poor now, tried lots of things, problum is when it gets hot it starts to run very bad, wont idle or rev very well, new coolent temp, ecu checked, new o2,tried coil pack, map, stepper motor, timing checked, compresion and leakdown checked, new fuel pump, pressure reg, had loom checked, any one had this problum or can help, thanks 