Hey everyone,
New here. not really just dont post alot. Ok first I'll explain what I've done this way you'll have a better idea. 2002 Ranger xlt 3.0
First off what's new:

1. Maf sensor
2. Injectors
3. Plugs
4. Wires
5. Mds coil
6. Pcv valve (pain in the (a$$)
7. O2 sensors (upstream)
8. Serpentine belt
9. Fuel filter
10. Fuel pump

upgrade
60mm throttle body (2002 escape)
Cold air intake

Problem P0171P and p0174 codes still showing up. These started the whole replacing of everything. But still throwing these codes.
Also on occasion oil gauge goes crazy.
Running out of ideas of what could still be causing issues.

And help or ideas welcome

 

What year and engine would be a good place to start.

Those aren't upgrades, all that did was really confuse your computer.
The factory cold air intake was a lot better then what ever you put on, it got it's COLD air from behind the head light, your so called cold air intake gets it's HOT air from under the hood.


You've already replaced the MAF sensor
Hopefully your CAI isn't using an oiled filter


Have you checked your fuel pressure?
Might be time for a smoke test to check for vacuum leaks.

 

Haven't done fuel pressure test .been reading about that. As far as the air intake it has plumbing running forced air to the filter. Does oiled filter make a difference?

 

All started with vacuum leak in pcv tubing the elbow rotted. So since you need to remove the intake to change it I replaced all the goodies. Everything is all tight and torqued to spec.

 

Also not used to vehicles with computers telling me you cant do that. That's why I'm looking for insight. Maybe I missed something by changing things or do I have to get different parts to compensate for the changes made.

 

Oh fun now the door locks move while trying to start the truck....wtf

 

Any updates? Have you tried a smoke test? I'm going down a similar path with the codes and will be replacing all O2 sensors and the fuel filter this weekend.