I have a 1989 olds 88 3800 engine it misses and i get  code
#13 please what? is that.                                                      







JK:
Code 13 is the oxygen sensor circuit.
Missfires can be anything from basic spark plugs, coils, plug wires, or injectors.
Thinking back, the ECM(computer) were also known for causing oxygen sensor
codes and missfires of 1 or more injectors. With the age of the vehicle, it would need
to get checked out at a shop.



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