Diagnosis assistant for codes to pass inspection
I am trying to get my sons Ranger to pass inspection so we can re register it. I bought the truck used and they gave me a copy of the previous inspection test. I find it a liltte shady it passed since it has only been a year and now I can't get it passed, because code after code keeps coming up.
The patient is a 98 Ranger XLT 4X4, 6cyl 4.0l OHV (180,000) miles.
Here is the story,,,,,,
Took it to inspection and failed for P0401 EGR insufficient flow and P1131 Manufacturer Controlled Fuel and Air Metering.
I have replaced the EGR Valve as it was looking pretty bad as well as the vent tube. I must say that was a chore in itself, that tube was on there like a MF'er!!
I also replaced the Air Temp Meter Sensor thingy between the MAF and the TB as it was in bad shape. This was at the suggestion of the mechanic who did the inspection.. hmm??
Since I pulled negative battery terminal to reset computer, I drove truck around for a few days and walla, the CEL came back on, took to autozone and pulled same two codes above.
Now after reading numerous post on here, the DPFE was the next victim to be replaced.
While I was at it, I also threw on a few other new parts as the truck needed. I replaced the IAC, fuel filter, carb cleaned the TB, ran a can of seafoam through the intake.
Once again, replaced negative batt terminal, ran truck for a few days and she purrs much nicer now and idles alot better. The DAMN CEL came back on!!
I still have the P1131, but now have a P0174.
In ref to P1131,,, I have pulled the PCV and hose, all are in good working order, PCV shakes and rattles, hose from pcv to intake is solid. I have checked as many vacuum lines that I can see to make sure they are fitted properly. Not really sure how else to check for a vacuuum leak?? I am a NOOB in that department!!!!!!!
In ref to P0174, could it possible be the O2 sensor? I have read both instances on here that the O2 is working if it pulls that code so it is not bad and most likely a vacuum leak, to cleared P0174 after replacing O2 sensor.
I have pulled all three of my O2 sensors and they appear to be newer then what I would expect the original ones to be, other then that I am not sure if they actually need to be replaced.
Any help with this will be greatly appreciated!!!!!!! I thought I was buying a good deal in this truck but it is slowly wearing on me and the sooner I can get it to pass inspection , I might just be putting it on the market!!!
This is a great forum to learn about how to do anything on this little truck, I have learned some really good tricks!!!! I never knew what seafoam was until I stumbled acrossed it on here and boy it made a difference!!!
Thanks in advance
All American baby!!!