2001 running rich, no power, poor MPG’s

[Kesh2011]

Another thing I noticed is that it will idle smoothly when it is in park but the idle is rough when it is in gear. I don’t know if that matters?

 

[8thTon]

AGSF32FM are fine plugs for this engine, but they still don't last forever. The wasted spark ignition will still burn the center electrodes on 3 of them faster than the others and I've never had luck re-gapping them in other Ford engines with this ignition. Why not replace them? It's not expensive or difficult.

 

[Kesh2011]

My plan is to replace them after I Seafoam the engine again.

 

[pjtoledo]

anybody notice the 85 octane? how are these engines supposed to run on 85? I wonder if the PCM is retarding the timing just a bit.

 

[Ranger850]

anybody notice the 85 octane? how are these engines supposed to run on 85? I wonder if the PCM is retarding the timing just a bit.

I thought about it, but since nobody else mentioned it, I was gonna stay out of the way.the lowest I can get is 87. 85 has to be mostly kerosene that will make it run rough for sure

 

[Kesh2011]

I filled it up yesterday. I’ll run it out and put some better gas in it next time

 

[pjtoledo]

we need a clarification,,,85 octane gas or E85 alcohol blend.

 

[Kesh2011]

After reading your post I wasn’t too sure so I went back to the local gas station where I usually fill up and they said it was 85 octane and not E 85.

 

[Kesh2011]

The check engine light came on again so I went to O’Reillys and they put their scanner on it. They got code P0171,P0113., And P0102. He said they are 02 sensor, Throttle position sensor, and mass airflow sensor.

 

[alwaysFlOoReD]

P0102 Mass or Volume Air Flow Circuit Low Input
P0113 Intake Air Temperature Circuit High Input
P0171 System too Lean (Bank 1)

p171 - this would lead to rich running. I don't know which side it is but o2 sensors have a life span of 60,000 to 100,000 miles. If they haven't been changed before then at the very least change the front two sensors. The rear two sensors are used to make sure the cat is working and don't have an effect on the engine.

The other 2 codes I can't help.

 

[8thTon]

Mass Airflow too low, O2 too lean - could be an air leak downstream of the MAF sensor but in front of the throttle plate, letting in air the MAF does not see. Not sure how the air temp sensor could be involved - it's located near the MAF but it's a separate connector.

 

[Kesh2011]

So I ordered some parts. I’m going to change the MAF, the TPS, and O2 sensors. We’ll see how she runs after that

 

[LeftHander]

Is this a flex fuel truck? If so, and if you put Sea Foam in the fuel system, that may be your problem. The flex fuel sensor sees Sea Foam as alcohol, and dumps a very large amount of gas into the engine since alcohol runs about twice the volume of straight gas to run right. ANY Sea Foam (and potentially any other fuel cleaner/additive) will cause this problem to some extent.

 

[Fordblue213]

Does it run more rough idling after its warm or after you run it hard?