RangerNed
Joined: Mon Oct 23rd, 2017
Posts: 30
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Hey guys! Thanks for responding. FWIW, I do not have an EGR or the other incidentals mentioned as part of my motor (that may have made things easier to diagnose)! I have a rather simple vacuum system on this truck and the lines seem pretty solid (no leaks). I had checked the MAF, TPS, IAC prior to posting and they had seemed to have checked fine according to the instructions that I had found on-line. I spoke with my son-in-law who had a Mustang at one point in time and on that car that he needed to change the ECT sensor. I did a lot of reading on other ranger forums with similar symptoms to what I have posted and the ECT (engine coolant temp sensor) was mentioned several times as a possibility. So tonight (Thursday), I said the heck with it and replaced it (AZ Duralast part $22.00). The connector on the sensor was rusty and covered in dirt. I cleaned the female connection and tightened things back up. Pulled and cleaned the plugs (driver's side plugs were pretty fouled up). Turned the key and things fired right up. No stumbling, no rough idle, no crap blowing out of the exhaust. Drove around for a bit and was coming home when it threw a CEL.
The codes KOEO: 159 157 177 KOER: 137
Do you suppose these are the aftermath of what went before (way too rich condition)? I do not know if any of the O2 sensors have ever been changed on this vehicle. Thanks for any guidance.
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1994 Ford Ranger Extended Cab XLT
2WD Automatic 4.0 V6 OHV
MODS: LED Dashlights, Wired for OHC (don't have the guts to cut the headliner), Lighted Visors, Auto-Dim/Mirror, Auto Headlights, other than that it's pretty much stock
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