Hello everyone, ,
I could really use some help w/ this one I'm stuck.
I've tried several times to pull KOER codes, keep getting error message "check connections unable to complete test" However I am able to pull the KOEO codes I've followed testing procedures very carefully can anyone give me any ideas? Tks.

 

Forgot to mention 1986 E150 302 EFI

 

What are you using to pull the codes? Try the freebie method of watching the Check Engine light flash, and see if you can get the codes that way.