throwing 8 codes on a 94 z28

the 8 codes it is throwing are:


42:electronic spark timing circuit open or shorted

43: electronic spark control circuit low voltage

44: lean exhaust left side

45: rich exhaust left side

51: computer faulty

53: system voltage too high over 17.7

54: fuel pump circuit fault

55: electronic control module fault or oxygen sensor fault




ok so here is what it does. when you start it up as it warms up the coolant fans goto 12 volt mode voltage goes up to like 15 or 16, car sounds like timing is screwed up. when driving around if under 1/4 throttle no light sounds good runs good, over 1/4 throttle bad timing sound, check engine light, voltage increase, fans on 12 volt circuit, poor acceleration.


right now i am leaning towards the ecu is screwed up. but i would like to hear other opinions as well. i have already disconnected the battery and hooke dit back up after 15 minutes. i already have cleaned out all the sensor connections except the ecu one (doing that in a bit), changed 7 plugs (damn front one on passenger side is a pain waiting till it warms up to work on it).