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1992 Ford Explorer xlt 4x4 4.0

C_korzie

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September 27, 2014
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Year, Model & Trim Level
1992 ford explorer
hello everyone, my name is chris. about 2 months ago i ran into some problems with my truck running rough. my story is long so im going to sum it up. i did the basics, new plugs and wires, coil pack. nothing new. check fuel pressure and sure enough i didnt have enough so i replaced it and my fuel filter and that worked for a while. my truck will start and run but will run rough and the it will run fine. when in drive and under a load when i go to give it about half throttle it will bog down and try to die.
The parts i have replaced are as followed- mass airflow sensor (twice), idle air control valve, tps(twice with code present), engine coolant temp sensor(twice with code present), air charge temp sensor and 1 o2 sensor.
the computer that was in it wouldnt let me pull any codes after i drained all the current. just a steady check engine light that gives me code 998 KOER. so i ordered a new (used) one. put it and still the same problems present. i have also checked the fuel pressure regulator and no gas came out even after 10 minutes of running.
battery is also new.
any help would be much appreciated, thanks.
 






A quick update. the code after the 998 code is 118. i have 4.6 volts at the plug and at the computer. so would it maybe be the return wire?
i am still doing research.
 






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