F150 Boost pressure feels limited

[sm105k]

The Dealership did it.  It most likely corrupted the ECU with the new flash. 

 

[Defhd10]

I'd be very careful tossing a rod,  if the dealership/ford network/warranty-company has you marked down as 'modified' they will not honor a engine rebuild.  I ran into that with my Bad injector taking my block out.  I had to pay out of pocket.

Understand the frustration though...

Im already out of warranty, so nothing really to lose at this point.

 

[Defhd10]

The Dealership did it.  It most likely corrupted the ECU with the new flash.

I would like to believe this is true, but i really dont know. I had too many things happen at once for me to point it directly at the flash. Im mostly leaning towards the condensation causing the problem. I cant confirm 100% what the boost was directly after the misfire because i was stock tuned and wasnt paying any attention. As soon as i got the tune back on is when i noticed the problem. And when switching back to stock i noticed it was still present because i was paying attention to it. Granted this was after the dealer flash, but i still cant confirm thats what caused it.

 

[Defhd10]

Curiosity got the best of me today so i pulled my o2 sensors as well as dropping the downpipe to take a look at the back side of the turbos. The o2 sensors look fine. Driver side looks the same as the passenger side. The back side of the turbos look fine too. I was really hoping to find a wore out wastegate, but of course i didnt. Both are seated when closed and no play when open. With that said i feel like ive explored all my options at this point.

Does anyone know why i would have erratic OAR like Topher pointed out?  Ive fuelled from a different station that i normally do that past 2 fillups and used 93 octane rather then 89. I will say that the truck does feel like its running a bit smoother on the 93, but still having the boost limited to 7 lbs. Im trying not to give up on this thing, but the end is near.

 

[Defhd10]

Okay guys the truck finally threw 2 codes tonight. Both related to throttle position voltage to low. Now i had tried a throttle body in the past with no change, do you think it could be the accelerator pedal?

 

[SHOdded]

Both codes are pointing to the wawa pedal, not the throttle body, so that's what I would check first.  Highly unusual for it to be that, but if there has been water intrusion of any kind, then it is quite possible.

P2122 - Throttle/Pedal Position Sensor/Switch D Circuit Low

Description:  This DTC sets when the accelerator pedal position 1 (APP1) is out of self-test range low. 
Possible Causes:  APP1 circuit open
APP1 circuit short to ground
Damaged APP sensor

Diagnostic Aids:  An APP1 or APP_D sensor PID reading may indicate a concern. 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All    GO to Pinpoint Test DK . 


P2127 - Throttle/Pedal Position Sensor/Switch E Circuit Low

Description:  This DTC sets when the accelerator pedal position 2 (APP2) is out of self-test range low. 
Possible Causes:  APP2 circuit open
APP2 circuit short to ground
Damaged APP sensor

Diagnostic Aids:  An APP2 or APP_E sensor PID reading may indicate a concern. 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All    GO to Pinpoint Test DK . 

 

[Defhd10]

Both codes are pointing to the wawa pedal, not the throttle body, so that's what I would check first.  Highly unusual for it to be that, but if there has been water intrusion of any kind, then it is quite possible.

P2122 - Throttle/Pedal Position Sensor/Switch D Circuit Low

Description:  This DTC sets when the accelerator pedal position 1 (APP1) is out of self-test range low. 
Possible Causes:  APP1 circuit open
APP1 circuit short to ground
Damaged APP sensor

Diagnostic Aids:  An APP1 or APP_D sensor PID reading may indicate a concern. 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All    GO to Pinpoint Test DK . 


P2127 - Throttle/Pedal Position Sensor/Switch E Circuit Low

Description:  This DTC sets when the accelerator pedal position 2 (APP2) is out of self-test range low. 
Possible Causes:  APP2 circuit open
APP2 circuit short to ground
Damaged APP sensor

Diagnostic Aids:  An APP2 or APP_E sensor PID reading may indicate a concern. 
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All    GO to Pinpoint Test DK .

Thank you!  Im going to try the pedal out of my dads truck this weekend and see if thats it.

 

[SHOdded]

Best of luck!

 

[sm105k]

I really hope this works for you. 

 

[Defhd10]

I really hope this works for you.

Thanks man me too. Been doing alittle bit of reading. If its not the throttle pedal,  it could be a bad wiring harness or a bad pcm. Really hope its not either of those but i guess i will find out.

 

[TopherSho]

With the whacky OAR reading,  I am leaning to a harness issue or at the lower end of possibility a ECU causing it to adjust itself.  Have you pulled the harness off the ECU?  Z/SHOdded have seen corroded plugs before..

 

[Defhd10]

With the whacky OAR reading,  I am leaning to a harness issue or at the lower end of possibility a ECU causing it to adjust itself.  Have you pulled the harness off the ECU?  Z/SHOdded have seen corroded plugs before..

I have pulled the 2 main harnesses off the pcm and everything looks fine there. Nothings corroded

 

[ZSHO]

There should be 3 harnesses connectors!  For reference here is good link for ya. I think you Need to provide as-built-data. Z

https://circuitboardmedics.com/ford/

 

[Defhd10]

There should be 3 harnesses connectors!  For reference here is good link for ya. I think you Need to provide as-built-data. Z

https://circuitboardmedics.com/ford/

Only 2 on mine unless im missing something

 

[Defhd10]

Pedal is on and codes are cleared. It does feel alot better and seems to be holding 6th alot longer before a downshift,  but im still not 100% if its fixed. Boost still looks to be the same, but i havent put my tune on to see if it increases. I want to run stock for alittle to see if codes return and if it starts acting up again.

 

[SHOdded]

Oh man!  Really hope the PCM is not bricked!  It should detect issues with the MAP sensors but ... are both identical on your F150?

 

[Defhd10]

Oh man!  Really hope the PCM is not bricked!  It should detect issues with the MAP sensors but ... are both identical on your F150?

Both MAP sensors identical or what are you asking?  So far no more codes after switching out the pedal and it does feel somewhat better, BUT i did put my pedal in my dads truck, and his still runs perfect. So is it just in my head that mine feels better maybe. I guess i need a few more days to see what it does.

 

[SHOdded]

yeah it might be a placebo effect ...  I was wondering if both are 2.5 bar sensors or if one is 2 the other is 3 like on the SHO.  If they are identical, swap them and see if you see a change in behavior.  That kind of thing.

 

[ZSHO]

Is the wastegate hose intact based on the pic below! 
I would not give up on this truck that easily IMHO! Z

 

[SHOdded]

Yeah, I mean, you can always contact Ford Customer Service and tell them that your truck has been misbehaving since this flash update was applied.  If they have something (engineering team), they can help you right away, or call on the engineering team to look into it.  This is a big deal, and they want their F150 customer base, as far as I can tell LOL.