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This question has been on here before from me. And was givin…

Customer Question
This question has been on...
This question has been on here before from me.
And was givin up on still having problems. Maybe someone can lead me in the right direction.
I have a 2003 F150 5.4 liter engine that stalls intermittently all the time . Mostly shifting into gears reverse or drive but not all the time also stalls idling . But always starts right back up immediately NO CODES AT ALL
Things replaced
Fuel pump
Fuel filter
IAC motor
MAP sensor
Crank sensor
Spark plugs and coil packs
DPFE sensor
EGR valve
PCV valve
Please HELP
Thanks Tom
Submitted: 9 months ago.Category: Ford
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Answered in 9 minutes by:
8/2/2017
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago
David Craig
David Craig, Auto Mechanic
Category: Ford
Satisfied Customers: 5,422
Experience: owner/mechanic at 3D Automotive
Verified

Hi Tom, Im David, thanks for visiting the site. Have the transmission scanned for fault codes. Transmission faults usually wont turn on the check engine light and have to be scanned with a scan tool that has the capability of interrogating the Transmission control section of the PCM.

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Customer reply replied 9 months ago
I can run transmission code it's clear as well . I did read about bad torque converter causing this but I don't know . If you just leave it run in park it stalls sometimes too .
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

Have you monitored the engine parameters and freeze framed them when thee stall happens?

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Customer reply replied 9 months ago
Ok that is something I really am not sure of how to do . Are you familiar with snap on solus pro ? Maybe step me through it ?
Customer reply replied 9 months ago
I can get data display but not sure about freeze frame your talking about
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

you can record the parameters for the data display and play it back to see what was happening at the time of stall.

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Customer reply replied 9 months ago
Ok I'm at work right now I can run it after I get off and get back with you is that OK ? I may have to do research on how to do what your saying
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

absolutely. ill be here

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Customer reply replied 9 months ago
What should I be looking at the most ? What engine parameters ?
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

theres nothing in particular, stft's, ltft's, egr command, etc.....it could be anything.

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Customer reply replied 9 months ago
Ok I will do my best Thank you
I'm mechanically decent but computers and I normally don't see eye to eye
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

let me know when you are ready to start looking at the data

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Customer reply replied 9 months ago
Ok Thanks will do
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok

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Customer reply replied 9 months ago
I'm home now if your available to walk me through this data
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

wont be available until around 7 eastern. very busy today here at my shop.

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Customer reply replied 9 months ago
Ok give me a message I will try to find freeze frame stuff it stalled at idle after 2 minutes of running so far
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok

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Customer reply replied 9 months ago
O2 bank 1 sensors 1 and 2
(mV) are from like 822 to 49
Bank 1 sensor 1 (mV) 811 to 47
Is that normal?
Fuel trims are long term 1. 7 to -1
Long term 2. 0 to -5
Short term 1. 8 to -6
Short term 2. 5 to -9
Maf gm/s stays around 5.5 at idle
Maf (V). Stays around .90 at idle
DPFE (V). Stays around 1.03 at idle
Idling around 660 RPM
IAC (%) around 24% at idle
Customer reply replied 9 months ago
Don't know if this helps without fault codes there is NO freeze frame data
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok, let me look at this for a few

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Customer reply replied 9 months ago
Ok anything else you need me to look at?
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

Ill let you know Tom for sure.

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Customer reply replied 9 months ago
Ok I work from 6AM til 5pm but I will take any advise you can give me
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

I will do my best. This one seems like a doozey.

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Customer reply replied 9 months ago
I know but someone has to know the answer just haven't found the one yet . It runs very good most of the time always starts right up . But will die all the time going down the road or sitting there idling . I've probably run it for 30 minutes and hasn't died once . I replaced ignition switch too
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

well the 02's look good

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Customer reply replied 9 months ago
Ok let me know if you need any other data tomorrow.
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok. I will

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Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

I dont think I like the MAF readings.

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Customer reply replied 9 months ago
Ok what should I be seeing ? Roughly ? It was replaced at a Ford dealership within about 8 months not saying it's 100% good . I don't have a scope to test it the right way but if there's any test I can do with multimeter or scan tool you want me to try I will do whatever I can just let me know .
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

http://easyautodiagnostics.com/ford/4.6L-5.4L/maf-sensor-tests-1

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Customer reply replied 9 months ago
Ok I will let you know what I find out later today Thanks
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

OK

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Customer reply replied 9 months ago
Ok ran tests on MAF today
3 out of 4 tests were good grounds and 12v test
The 4th test signal wire I had
Key on engine off .07 volts
At idle 650 RPM .77 volts
At 1500 RPM 1.22 volts
At 2500 RPM 1.58 volts
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

thats no good

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Customer reply replied 9 months ago
Ok I will get a new one put on then see if my readings change . Where do you suggest buying a sensor from? NAPA or where is a good place? Or buy from Ford but like I said 6 to 8 months ago Ford replaced it $600 bill for me .
Customer reply replied 9 months ago
Ok will do
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok

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Customer reply replied 9 months ago
I have that MAF on the way . So my voltage should be higher than what I'm getting then? 1.4 volts at 1500 RPM and 1.8 at 2500 RPM that's what I'm shooting for correct?
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

did you run through the entire test with a volt meter?

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Customer reply replied 9 months ago
checking with scan tool hooked up . Scan tool and multimeter where very close . I don't have a scope to catch any glitches though but yes all readings I gave you were with multimeter
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok, then its definitely not right

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Customer reply replied 9 months ago
voltage should be higher then that?
Customer reply replied 9 months ago
It will take a few days for me to get new sensor . I'm just trying to figure out where I should be at . Because fuel trims are not that bad I don't think
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

do you have 12 volts on the red wire?

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Customer reply replied 9 months ago
12.20
Customer reply replied 9 months ago
I did ground test and circuit ground test to positive post on battery they were 12v plus a little 12.20 I believe
Customer reply replied 9 months ago
Using T pins in connector plugged into MAF sensor
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok, what about the signal?

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Customer reply replied 9 months ago
The signal wire is all the readings I gave you yesterday
Customer reply replied 9 months ago
That's why I'm asking if you have any parameters what the voltage should be if your saying it's not right like a flow chart or something for the MAF
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

everythings a tad low. not by much but below what they should be. are the readings stable?

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Customer reply replied 9 months ago
they are stable til idle drops down when it's about to die but that maybe normal lower idle = lower voltage
Customer reply replied 9 months ago
I can focus more on it running and trying to keep RPMs consistent
Scan tool is a little slow but without a scope it's going to be a little behind
Customer reply replied 9 months ago
see if there are any drop outs but don't know if I can catch it on scan tool
Customer reply replied 9 months ago
I don't understand why it's not throwing fault code as bad as it idles and stalls all the time
Customer reply replied 9 months ago
Either way I ordered the new MAF sensor and I will put it in as soon as I get it then I will give you readings hopefully they will change some
Customer reply replied 9 months ago
please don't close this chat like the other guy did
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

Dont worry, I wont close it my friend

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Customer reply replied 9 months ago
Can a torque converter cause this ? Even stalling at Idle?
Customer reply replied 9 months ago
I have read lots of bad things about them but normally shifting in reverse or drive . But this dies at idle as well
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

you would have transmission codes.

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Customer reply replied 9 months ago
it has to be engine problem then of some sort ?
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

yes

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Customer reply replied 9 months ago
Ok I will let you know when I get MAF sensor changed then we can move on if that doesn't fix it . If your still willing to help me .
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

sure my friend. never give up....thats me

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Customer reply replied 9 months ago
Is there any other sensors or voltage on anything else you need me to get ?
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

no

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Customer reply replied 9 months ago
Another question to you can the exhaust manifolds leaking cause engine to stall? Because there is a lot of noise from them
Customer reply replied 9 months ago
Haven't received MAF sensor yet hopefully today or tomorrow then I will put it in . Just thought I'd ask about exhaust manifold gaskets
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

the exhaust manifolds leaking wont cause a stall, possibly a lacking of power.

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Customer reply replied 9 months ago
Ok just thought I would ask . I'm trying to think of things not controlled by PCM since there are NO codes its baffling me
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

the only component that sometimes doesnt throw a code is the crankshaft position sensor

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Customer reply replied 9 months ago
I replaced it too . I can try to get some data on it tonight if you'd like while I'm waiting on MAF sensor to come . Camshaft position sensor I have NOT replaced yet
Ford Mechanic: David Craig, Auto Mechanic replied 9 months ago

ok, well Im going to open this p to the other techs to see what they think. good luck

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Customer reply replied 9 months ago
I will go to that easyautodiagnostics and check the crankshaft positioning sensor tonight . Thanks for that site by the way .
Customer reply replied 9 months ago
Come on Ford Mechanics help me out !!!
Customer reply replied 9 months ago
REPLY
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago
AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 27,831
Experience: ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
Verified

Hello! Different expert here.

Would you be willing to speak on the phone?

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Customer reply replied 9 months ago
I'm at work right now . So I can't right now . Have you heard of anything like this before ?
Customer reply replied 9 months ago
Can you see all the conversation that the other expert had with me?
Customer reply replied 9 months ago
But yes I'm willing to talk on phone if your willing . If you want to set a time I should be around truck in about 1 hr . I can send message when I'm there or if you want another time I'm good with that too.
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago

I can speak tonight after 6 pm Eastern time.

I will send over the phone call offer now.

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Customer reply replied 9 months ago
I put a MAF sensor in fuel trims are going nuts key on engine off short term is at 41 long term at 0
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago

Please accept my offer and call me now

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Customer reply replied 9 months ago
How do I do that? Is it an email?
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago

You should get a pop up on your screen with my contact information.

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Customer reply replied 9 months ago
How about now?
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago

No sir, I did not see it come through yet.

If your using a phone, you might have to adjust or disable your pop up blocker in your settings.

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Customer reply replied 9 months ago
It has came off my card
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago
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Customer reply replied 9 months ago
MAF sensor fixed my problem
Ford Mechanic: AMEDEE, FORD TECHNICIAN replied 9 months ago

Glad to hear it is all fixed!! You are most welcome!!

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