ok i have a 87 mustang gt. it was running fine one min and i stopped at a stopsign and it started surging idle. so i drove it to town and was gonna get a tps andwhen i got out at the parts house it was overloading with fuel so bad it was smoking. long story short i have changed the TPS, THROTTLE AIR BYPASS VALVE, EGR VALVE, PVC VALVE, FUEL PRESSURE REGULATOR, INJECTORS AND O-RINGS AND CAPS, AND TEMP. SENSOR, ALSO RAN A COMPRESSION TEST ON EACH CYLINDER AND ALL WERE 90LBS OR ABOVE AND CHECKED THE INTAKE GASKETS AND CHANGED THE PCM AND I DID A VOLTAGE CHECK ON THE INJECTORS, THEY ALL HAVE 12 VOLTS WITH KEY ON AND ENGINE OFF....... The only thing i havent changed is the intake, fuel pump, and map sensor. but after those im drawing a blank. help please.....correction just changed the map sensor and no luck.