Question: My 2wd ford is running lowsy like the timing is off.  my haynes manual  dosn’t give me all the codes  that come up.  Need help on codes KEKO #31,  R #31  C #18 #31  The motor is  5L multi port fuel injection.

Thanks

Answer: According to my Chilton’s manual #7768, Fuel Injection & Electronic  Engine Controls, the #31 codes, either Continuos, KOEO or Engine  Running, point to the EGR system,specifically EGR Valve Position  Sensor ( that plastic electric connector thing on top of the actual  EGR valve) and the EGR Valve Regulator (your guess is as good as mine  on where that thing is located).  Code #18 points to the module  mounted on the side of the distributor and to Spark Timing.  If need  be, I can scan the pages and send them to you via e-mail.  The Haynes  manual should explain the ignition timing procedure for you.  The EGR  Valve Position Sensor tells the computer how far open the EGR valve  is, but it can malfunction and send the wrong signal to the computer.  The computer can then keep the EGR valve open when in reality it  should be closed.  If the EGR valve is open at idle speed, the engine  will be groggy and may not even run.  The air/fuel mixture will be too  dilute to allow the engine to idle properly.

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