Problem started as a miss while on cruise at 60 mph. Stopped car,checked plug & coil wires, restarted o.k.,mil turned of. Later, on cruise ctrl., engine quit. Checked & wiggled wires again, restarted & ran o.k. w/no check eng.(mil) light. About a week later,in the morning,no start. Fuel pump running constantly.(I have an EEC tuner installed & o.k. for over a year.) Spark o.k.,fuel pressure o.k., injectors not firing. Removed tuner chip and cleaned contacts as dirty ones may cause fuel pump run-on. Reinstalled chip. No go. Removed chip. Car starts and runs, but mil is lit. Put a code reader on and retrieved codes as follows: 51',ect out of range or circuit open;22 bp out of range;53 tps above max voltage;54 act open circuit; 35evp/pfe (dont know what evp/pfe is);67 clutch switch circuit failure. What's going on? How do I proceed?