'87 Chevy G20 Van...1000RPM when cold, 15-1700RPM when warmed up, starts great, good vacuum, great power...
Got a code 45 which is a rich condition(at the O2 sensor). What specific areas does everyone think(or know) I should look at before changing the O2 sensor(if needed).
...Injectors, MAP sensor, IAC solenoid, TPS, FPR, fuel filter, Fuel pump, cap and rotor...all good. New EGR valve, EGR solenoid, and timing set. Plugs look great and wires all have good Ohms. I should probably change the plugs and wires before the snow falls though huh?
What's everyone's ideas, opinions, and experiences about this?