Still p0301 and some 0171

[oknopa]

After new spark plugs, cables and ignition coil, new rear main seal, new gaskets on oil pan, intake manifold, exhaust manifold, camshaft covers, new fuel pump, new fuel filter, new PVC elbows and new PVC valve....

Still get the codes 0301 and 0171.. what is missing?

 

[DILLARD000]

p0171 = Bank1 Too Lean
p0301 = Cylinder1 MisFire

Have you swapped Plug1 &\ Wire1 with another to see if the problem moves with that Plug\Wire?
Have you swapped Injector1 with another to see if problem moves with that Injector?
If OxSensors are older than 100kMiles\10Years, they need to be replaced.
Again, neither your thread or signature or profile note what Year+Engine+Tranny+...
Folks much less likely to answer your questions if you don't state that basic info.

 

[oknopa]

p0171 = Bank1 Too Lean
p0301 = Cylinder1 MisFire

Have you swapped Plug1 &\ Wire1 with another to see if the problem moves with that Plug\Wire?
Have you swapped Injector1 with another to see if problem moves with that Injector?
If OxSensors are older than 100kMiles\10Years, they need to be replaced.
Again, neither your thread or signature or profile note what Year+Engine+Tranny+...
Folks much less likely to answer your questions if you don't state that basic info.

Will fill out the missing information and order new 02 sensors and will swap the cable and plug tomorrow..

 

[oknopa]

Will fill out the missing information and order new 02 sensors and will swap the cable and plug tomorrow..

Any recommendation for the sensor, or just some OEM?

 

[Phil Frady]

Is the fuel injector for #1 plugged in? Check the injector and see if it’s clogged.

 

[oknopa]

Is the fuel injector for #1 plugged in? Check the injector and see if it’s clogged.

Will check..

 

[oknopa]

It's not the plug or plug wire, I flipped them and after a while both code's are back..

 

[DILLARD000]

Any recommendation for the sensor, or just some OEM?

For OxSensors, best to stick with FordMotorCraft or Bosch (original manufacturer for Ford).
Avoid cheap asian imports\copies; they tend to work for a few months then die young.
A Bosch 15719 with 24i00 0m610 Long Cable+Plug is good to replace any Ford 4WireNarrowBand Sensor.

Click here for more info on OxSensors.

 

[DILLARD000]

It's not the plug or plug wire, I flipped them and after a while both code's are back..

At least now you know the problem is not Plug\Wire#1.
Injector#1 or OxSensor#11 are now the prime suspects.

 

[oknopa]

Ok, will order the sensor, I looked the sensor and my not even lift up the car to replace him, not sure about the fuel injector, did I just need to take the injector rail of? In one video the took the intake of, I don't think so..

 

[Todd Z]

If the injector is dirty that's hard to diagnose, Run a cleaner, You can OHM the injectors coils and compare them to see if the injector electronics are bad.

 

[oknopa]

If the injector is dirty that's hard to diagnose, Run a cleaner, You can OHM the injectors coils and compare them to see if the injector electronics are bad.

just purchased the O2 sensor and put cleaner in the tank..

 

[oknopa]

ok, sensor replaced, but i cannot find the cable to plug the connector in? did somebody knows where is coming from? i reached in with my hand, but cannot feel the cable anymore?
nerver mind...found it..

 

[DILLARD000]

Yep that OxSensor11 connection is the most difficult one to reach,
between engine & firewall; requires patience & nimble long fingers.
Be sure to secure that cable with ties well away from the hot exhaust pipes.

 

[oknopa]

Yep, the sensor was easy, I sprayed w40 2 days ago, and today when I came home and the engine was warm.. took 5 minutes to loose him and 45 minutes to reconnect, lol... here the live data from the first short drive, but the sensor shows 0...

 

[oknopa]

Yep, the sensor was easy, I sprayed w40 2 days ago, and today when I came home and the engine was warm.. took 5 minutes to loose him and 45 minutes to reconnect, lol... here the live data from the first short drive, but the sensor shows 0...

Oh, I am wrong, there are data one the sensor, but the code p0301 came up again..

 

[DILLARD000]

Oh, I am wrong, there are data one the sensor, but the code p0301 came up again..

OxSensor11 data looks good;
OxSensor11 & OxSensor21 (upstream) both should ocscillate every couple of seconds 0.05~0.90v;
OxSensor22 (downstream) should be fairly stable above 0.60v, after warmup.
After installing the new OxSensor11, did you clear previous TroubleCodes with your OBD2 scanner,
then run the vehicle thru a full warm up & test drive, to see what new codes come up?
Code p1000 is normal after a clear\reset until all basic tests are recycled\complete, so ignore that one.
If p0301 is still coming up, that points to Injector1, as you've eliminated about everything else.

 

[Phil Frady]

You have a fuel delivery problem. Your short term fuel trim on bank 1 is at 15% and should be +/- 3%.

 

[oknopa]

OxSensor11 data looks good;
OxSensor11 & OxSensor21 (upstream) both should ocscillate every couple of seconds 0.05~0.90v;
OxSensor22 (downstream) should be fairly stable above 0.60v, after warmup.
After installing the new OxSensor11, did you clear previous TroubleCodes with your OBD2 scanner,
then run the vehicle thru a full warm up & test drive, to see what new codes come up?
Code p1000 is normal after a clear\reset until all basic tests are recycled\complete, so ignore that one.
If p0301 is still coming up, that points to Injector1, as you've eliminated about everything else.

thanks, will see whats going one when i drive to work today..

 

[oknopa]

You have a fuel delivery problem. Your short term fuel trim on bank 1 is at 15% and should be +/- 3%.

ok, thank you...i have one light gas smell sometimes in my Cabin when i drive, so maybe it's the Fuel Injector...it's almost the only think i have not changed or inspected yet..