| View single post by CBB9M | |||||||||
| Posted: Mon Apr 2nd, 2018 09:14 pm |
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CBB9M 23 year Ranger veteran  Joined: Sun Oct 22nd, 2017
Posts: 371
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After you have carefully and faithfully performed a visual and corrected anything under the hood, emission system, etc that needs to be fixed, there is one and only one correct way to address the codes you have found. That would be to fix them in this sequence: KOEO, KOER and finally, CM. You start with the lowest # code in each family, one at a time, fix it, clear codes, drive, check for codes. Repeat the just noted correct sequence. I cannot emphasize enough how important it is to follow that exact sequence when troubleshooting and fixing problems on Ford EEC-IV engine management systems. Also, it really helps to have the FSM since within it are diagnostic flow charts for the DTC's that essentially lead the way for a systematic, organized and methodical diagnostic process for each of them. Beats the snot out of guessing, hoping, hyphotisizing, posting and getting guesses, spray-n-prey parts swapping, and overall waisting time and money. FWIW, I bought the FSM for my old 94 around 96, great investment for many service reasons during the time I owned it. Anyhow, this all this will get you pointed in the right direction. Last edited on Mon Apr 2nd, 2018 09:17 pm by CBB9M ____________________ -Bill 04 Ranger FX4 Level II, several mods |
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