random missfire

[steve0490]

ok im having a major issue, i originally got code 11 low ecm voltage which was caused by a faulty power cable which i fixed, ok so code 11 is gone now i have code 41 tps, now on my car the tps plug would always pop off and it would jsut make the car idle higher not affect its acceleration but still its missing, so i recalibrated the tps, and now i have code 51, which is something to do with the a/c which i do not have hooked up in my car im completely lost because i still have a miss, ive notice all these codes come back to a tps or something to do with the efi, i tried a new ecu, i checked all my grounds, all my fuses relays ect. does anyone have any ideas of what i should try next ive been working on this thing for months and have gotten no where. (its an 87 non turbo jdm 7mgte)