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2007 F250 5.4 Baro reading?

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16 Jan 2020 17:23 #36673 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
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16 Jan 2020 20:09 #36675 by Cheryl
Replied by Cheryl on topic 2007 F250 5.4 Baro reading?
I can’t remember but does this truck have an egr valve? That’d be something to check for it stuck open. Since it runs better at higher speeds. You got any screenshots of data for us??

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16 Jan 2020 21:31 #36677 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
So here is something weird. I changed the oil today. Went to 10w-30 from 5w-30 that was in it. But it' calls for 5W-20. So after the oil change. Crank no start. No Fuel pressure. tank was pretty low. put gas in fires right up. but wait! 2 pending codes.
p2106 Throt Actuator Control sys- Forced Limited Power and P061B internal control module Torque calculation performance
Also at elevated RPM it is surging. I can't maintain a steady RPM. almost like an injector kicking in and out. Also until today it would not rev above 3200 RPM in Park. only when in gear would it go above that. but now it goes way above that. like 4500 plus.

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16 Jan 2020 21:54 #36678 by Cheryl
Replied by Cheryl on topic 2007 F250 5.4 Baro reading?
what’s it take to set the throttle actuator code? Got any code setting criteria

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16 Jan 2020 23:23 #36680 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
Mitchel's says P061B Indicates calculation error in PCM. Checl sensor and circuit related DTC's Do not change ETB for this DTC. P2106 says the TAC system is in the FMEM (failure mode effects management)Mode of forced limited power. This DTC indicates the FMEM is in effect due to a concern in an ETC related component or module. This DTC is informational and may be set in combination with a number of other DTC causing the FMEM. Diag other DTC first. I'm going after a air filter in the morning. found this video after I found my air filter compromised.

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17 Jan 2020 14:17 #36689 by scannerjohn
Replied by scannerjohn on topic 2007 F250 5.4 Baro reading?
check the IAC... the valve may be sticking open. tap on it while engine is idling. IAC valve is controlled by its solenoid. also check the EGR valve.


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17 Jan 2020 17:27 #36692 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
I don't know what to check on the DPFE selinoid. Is that the egr? I don't see what I would call an EGR. It is running better (smooth again). But after running the RPM up it just wants to die at idle. Is this the DPE selinoid.
drive.google.com/file/d/1QEc7PNOjxxRtOaL...3H/view?usp=drivesdk

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17 Jan 2020 23:23 #36701 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
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17 Jan 2020 23:27 #36702 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
i think this is DP solenoid but not sure how to check it?
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18 Jan 2020 10:40 #36706 by Tyler
Replied by Tyler on topic 2007 F250 5.4 Baro reading?
That's the EVAP purge valve. That style almost never fails, in my experience. You can check it by disconnecting the vapor line (from the tank, the one with the green cap on it), unplug the solenoid and put your finger over the vapor port with the engine running. You should feel no vacuum.

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19 Jan 2020 00:37 #36716 by scannerjohn
Replied by scannerjohn on topic 2007 F250 5.4 Baro reading?
DPFE and EGR are related but are two different components. The EGR is attached to the intake and has a metal tube running from it to the exhaust manifold. Should have a vacuum line attached at the top. Unplug the vacuum line from the EGR. Should not have vacuum in the line at idle. If it does, the engine idle probably smoothed out when you unplugged it. The sensor that is attached to the EGR vacuum line is allowing vacuum at idle.


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21 Jan 2020 09:43 #36749 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
I really appreciate all the help. I am going out of the country on a mission trip and won't get back to this beast until February. In the meantime here are some pics of data. Cold idle 1500 and 2500.
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17 Feb 2020 16:04 #37588 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
So I now have a better scanner and did a couple things. First relative compression test. and Power balance. #3 cyl shows -32% . cyl 4 and 8 were slightly low but not nearly as bad as cyl #3. power balance shows #3 cyl very low. no surprise. here is a screen shot.
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18 Feb 2020 08:22 #37602 by Patrickreaves
Replied by Patrickreaves on topic 2007 F250 5.4 Baro reading?
clean throttle plate?

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18 Feb 2020 19:26 #37622 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
relative compression on #3 cyl. is -32%. is there anything I could check short of pulling the head?

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19 Feb 2020 21:36 #37660 by juergen.scholl
Replied by juergen.scholl on topic 2007 F250 5.4 Baro reading?
Basically you're experiencing a #3 and#4 misfire, going by your picture at idle speed. What happens with elevated rpm and/or when you put a load on the engine?

Pulling the head is not a move I'd start with...there are multiple possible causes for the misfires.

Depending on your gear you might want to start with a leak down test, running/snap compression test,.look at the injector current etc. A vacuum gauge is a great tool to detect mechanical issues as well.

An expert is someone who knows each time more on each time less, until he finally knows absolutely everything about absolutely nothing.

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20 Feb 2020 00:50 #37667 by MTROTR
Replied by MTROTR on topic 2007 F250 5.4 Baro reading?
The picture of the power balance confirms the compression test. #3 cylinder is 32% low. The miss fire is the result of a compression problem. You can hear it when you crank the engine.

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