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Along the way, my starter motor and starter solenoid both failed. I replaced them and put in a new battery. The replacement units are working like a charm. Compared to the old motor, the new motor starts very strongly.

I believe I have solved the problems. It's been three days since I've seen a Check Engine light, so I am cautiously optimistic. These were the problems - 0. EGR valve was not functioning properly. 1. I had to educate myself about the emission system, above and beyond what's in my...

I put in a new one just yesterday, the third in as many months. I don't think that's it. The funny thing about that EVR is the resistance across the terminals is too low to measure with my ohmmeter. In both directions, it reads as a short. My favorite theory right now is a...

Can anyone tell me what voltages I should read on my vehicle's DFPE sensor output? The original reads 0.90V. The replacement unit reads 0.09 V.

No, I have not, not yet. I am at my wits end, though, so checking for leaks is my next and almost last hope. Everything looks okay as far as I can see - hoses are supple and no gross corrosion is evident, anywhere.

I did some more work on this but still have a problem. I used solvent to clean the Idle Air Control valve. This smoothed out the rough idle quite a bit and the "coughing" sound is gone but I am still getting the following error codes. They are fewer and perhaps more focused now (EGR...

Thank you both for the input. I will check on both ASAP tomorrow. I can probably scrounge up my receipt for the DFPE, so I can get a free replacement. Perhaps I should get a spare, too, if things are as bad as you say (and they do seem to be). I'll try to trace the wires to ensure the...

I spent a few minutes checking some things today. One strange thing is the colors of the wiring to the DPFE are different than those in the schematics I have. Nonetheless, with the KOEO condition, I probed most of the possible combinations and got only two readings - about 4.8V (center to...

This is my first post. Okay, I am AMAZED and, frankly, overwhelmed, at everything on this forum. If any of you can help me pin point what's wrong, I'd appreciate the help. I knew it wouldn't last. Last September, I did some emission control system repairs on my 1993 Explorer so I could...