2.3L ('83-'97) 1986 Ranger Codes and Where to start

[T-Rey]

I have a ‘86 Ranger 2.3, 5spd, 2wd that runs well most of the time but will occasionally start to stall and or cut off while driving. It will start back if I keep it rolling kind of like a bump start. Sometimes it does it multiple times others it is a little miss then runs fine the rest of the time.

I went and bought a Innova Ford code reader today and these are the codes it pulled:

KOEO
84o
18c

KOER
34c
13c
77c
25c
28

I am not that familiar with this computer system and don’t want to waste a lot of time and money just throwing parts at the problem. I may have done the test incorrectly so if any of the codes look odd please speak up.

Thanks for looking,

T-Rey

While doing the KOER test I noticed that I had no check engine light. Part of this test, from what I have seen online, you need to rev the engine when prompted by the CEL. I have pulled the gauge cluster and I have no CEL on the circuit board. Tracing the circuit board to the plug on the harness it isn’t pined for a CEL either. Didn’t all EFI rangers come with a CEL?

 

[Daniel Black]

I had an '86 efi and I honestly can't remember if it had a check engine light or not. My code scanner told me when to go wide open and let off the throttle and when to push the brake pedal and let off. Mashing the gas test the TPS so if you don't do it it'll just make a code show for it.