1986t-bird help dont know what to do

[liltone]

I have a 1986 elan 5.0 runs smooth for 2 wks at a time then starts to diesel and knock then shuts off.I let set for15 to30 mins. then it starts up will run good for 3 or 4 days then the same thing over and over again I have replaced fuel filter 2 injectors throttle body sensor fuel pump coil a cople of vaccum lines o2 sensor just 1 (havent changed the other one yet) emission valve ignition switch still doing the same thing. I tuned it up about 6 or 8 months ago dont know what to do I am very desparate somebody help please

[overl0rd]

Where is your timing set? Is the TPS putting out the right voltage at closed throttle? Might be worthwhile to clean the EGR passages while you're in there.