newbie, not sure where the deep end is

[wlh144]

I just bought a 86 c4 has unknown mods and error codes. will appreciate advice and patience.

[dave w]

:welcome:

A good place to start figuring out what the errors are:

http://www.corvettebuyers.com/c4vettes/codes.htm

dave w

1984-1991 Corvette (L98: VIN 8 )
Code Definition
12 No Distributor Reference Pulse (this code is displayed only when engine is not running)
13 Oxygen Sensor Open
14 Coolant Sensor High Temp
15 Coolant sensor Low Temp
21 TPS Voltage High
22 TPS Voltage Low
23 MAT Sensor Temp Low
24 Vehicle Speed Sensor
25 MAT Sensor Temp High
32 EGR System Error
33 MAP Sensor Voltage High
34 MAP Sensor Voltage Low
41 Cylinder Select Error
42 EST System Error
43 ESC System Error
44 Oxygen Sensor (System Lean)
45 Oxygen Sensor (System Rich)
46 VATS Error
51 Mem-Cal Error
52 Engine Oil Temp Sensor Low
53 System Voltage Error
54 Fuel Pump Voltage Low
62 Engine Oil Temp Sensor High