The truck seems to run and drive fine but there are times when I feel a high frequency shaking. It is not related to vehicle speed or engine speed. This morning it got bad so I let up on the pedal (cruising at 40mph) and it went a way. Pushed the pedal back down and the shaking started again. Happens even when at normal operating temp on the highway. It feels like misfiring but there are no codes. I watched the Long Term Fuel Trims and they are +5 at idle and are above +10 up to +20 when accelerating. The values are about the same on both banks so that tells me that it is not a single cylinder/plug/injector causing the problem.

I also have a faint smell of gasoline at times. Many on the forum say the spark plug may be loose. I will check all plugs tomorrow.

Do the fuel trims seem too high? Possible a failing fuel pump controller???

The transmission seems fine but is there any way a tranny problem can cause an intermittent vibration issue???

UPDATE: I remembered posting questions about fuel trims a few years ago and I found the thread https://www.ford-trucks.com/forums/1...t-so-high.html
It looks like my fuel trims have not gotten worse.


TIA

 

Could be an issue with the torque converter or driveshaft (u-joints) and nothing to do with the engine. It would help if you could figure out what triggers it.

 

Any idea as how to check the TC?

 

I have done some reading on the forum. Someone said weak coils during EGR will cause misfiring without setting a code.

 

I have 110k miles on my 2005. I replaced the injectors last year just to be safe. Do coils wear out? Should I also replace all the coils?

 

How about the spark Plugs?
Have they ever been replaced?

 

I would just clean the cop's and put new boot's on with new springs....get some Denso's on Amazon for $30.00...And change the plug's if you have not already...

 

I replaced all the plugs in the spring as I had a #2 misfire. The plug was not tight so I think that caused the misfire. Today I inspected 7 of the plugs (the 8th is harder to get to). All were tight and looked fine. I drove today while monitoring LTFT on both banks and relative fuel manifold pressure. Both trims are similar and higher than I would expect (stays under 20). The pressure was near constant. There was no shaking (misfiring) so I will keep driving it and see if the readings change.
Last time I changed the boots and springs was at 30k miles so maybe I should change them (especially since the plug type is different than the previous set).

I still smell gasoline (faint) so maybe there is a leak. I have looked but can't find any issues. I replaced the injectors a year ago. I'll try searching the intake for leaks using solvent tomorrow.

Thanks for the help and please keep it coming.

 

Could be cam phasers,I had similar symptoms with my 5.4 in my 250 after about 2000 miles it went into limp mode and was able to get the code

 

Thanks.
Drove it today and no issues. Until I get throw a code, I guess it just a guessing game.
I am monitoring fuel trims and fuel pressure so I am hoping that when it acts up again I will be able to see if it is a fuel pressure issue, misfiring on a bank causing trims to significantly change, or none of the above.

Intermittent problems are tough to diagnose.

 

Intermittent problems are tough to diagnose.


YEs, and don't assume just because you changed the COPS that one has not started to fail.

 

My COPs are original so that is why I suspect they are causing the problem.

A friend gave me some great links on Ford misfires and diagnosis using mode 6

https://www.motor.com/magazine-summa...ford-misfires/
You need to download to see the pictures.

Mode 6 Misfire Diagnostics - Ford

A lot of good relevant information.

I ordered an OBD2 bluetooth interface and download the app Torque Pro ($5). Hopefully I will be looking at misfire counts by Sunday evening.

 

I was able to get a mode 6 dump using torque pro which is below. I highlighted the only thing that looks suspicious to me.

Any thoughts?
Some reading says I need to install ford specific pids but I don't know what that means.

Mode $06 report generated by Torque for Android
================================================

Vehicle VIN: 1FTPW145X5FA79982
Vehicle Manufacturer: Ford
Vehicle Calibration ID: RXCM5P3.HEX

Test report:
------------------
MID:$01 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 1 Sensor 1
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$01 TID:$80
- O2 Bank 1 Sensor 1
Max: 7.99527V Min: 0.49996V
Test result value: 0.69394V
PASS
----
MID:$01 TID:$81
- O2 Bank 1 Sensor 1
Max: 3A Min: 0.23A
Test result value: 0.503A
PASS
----
MID:$02 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 1 Sensor 2
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 3A Min: 0.23A
Test result value: 0.467A
PASS
----
MID:$03 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 1 Sensor 3
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$03 TID:$81
- O2 Bank 1 Sensor 3
Max: 3A Min: 0.23A
Test result value: 0A
FAIL
----
MID:$05 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 2 Sensor 1
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$05 TID:$80
- O2 Bank 2 Sensor 1
Max: 7.99527V Min: 0.49996V
Test result value: 0.68552V
PASS
----
MID:$05 TID:$81
- O2 Bank 2 Sensor 1
Max: 3A Min: 0.23A
Test result value: 0.48A
PASS
----
MID:$06 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 2 Sensor 2
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$06 TID:$81
- O2 Bank 2 Sensor 2
Max: 3A Min: 0.23A
Test result value: 0.537A
PASS
----
MID:$07 TID:$01
Rich to Lean sensor threshold voltage(constant) - O2 Bank 2 Sensor 3
Max: 7.99527V Min: 0V
Test result value: 0.44994V
PASS
----
MID:$07 TID:$81
- O2 Bank 2 Sensor 3
Max: 3A Min: 0.23A
Test result value: 0A
FAIL
----
MID:$21 TID:$80
- Catalyst Monitor Bank 1
Max: 0.63671Ratio Min: 0Ratio
Test result value: 0.02734Ratio
PASS
----
MID:$22 TID:$80
- Catalyst Monitor Bank 2
Max: 0.54687Ratio Min: 0Ratio
Test result value: 0.02734Ratio
PASS
----
MID:$3a TID:$80
- EVAP Monitor (cap off)
Test incomplete or dependant test failed
--
MID:$3a TID:$81
- EVAP Monitor (cap off)
Test incomplete or dependant test failed
--
MID:$3a TID:$82
- EVAP Monitor (cap off)
Test incomplete or dependant test failed
--
MID:$3b TID:$80
- EVAP Monitor (0.090")
Max: 859.25Pa Min: -8,192Pa
Test result value: 455Pa
PASS
----
MID:$3c TID:$80
- EVAP Monitor (0.040")
Test incomplete or dependant test failed
--
MID:$a1 TID:$80
- Misfire Monitor General Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a1 TID:$81
- Misfire Monitor General Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a1 TID:$82
- Misfire Monitor General Data
Max: 23.9994% Min: 0%
Test result value: 13.82709%
PASS
----
MID:$a1 TID:$83
- Misfire Monitor General Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a1 TID:$84
- Misfire Monitor General Data
Max: 966.60004°C Min: 0°C
Test result value: 456.30002°C
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a2 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a2 TID:$80
- Misfire Cylinder 1 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a2 TID:$81
- Misfire Cylinder 1 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a3 TID:$80
- Misfire Cylinder 2 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a3 TID:$81
- Misfire Cylinder 2 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a4 TID:$80
- Misfire Cylinder 3 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a4 TID:$81
- Misfire Cylinder 3 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a5 TID:$80
- Misfire Cylinder 4 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a5 TID:$81
- Misfire Cylinder 4 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a6 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 5 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a6 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 5 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a6 TID:$80
- Misfire Cylinder 5 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a6 TID:$81
- Misfire Cylinder 5 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a7 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 6 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a7 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 6 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a7 TID:$80
- Misfire Cylinder 6 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a7 TID:$81
- Misfire Cylinder 6 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a8 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 7 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a8 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 7 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a8 TID:$80
- Misfire Cylinder 7 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a8 TID:$81
- Misfire Cylinder 7 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$a9 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 8 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a9 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 8 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$a9 TID:$80
- Misfire Cylinder 8 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$a9 TID:$81
- Misfire Cylinder 8 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$aa TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 9 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$aa TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 9 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$aa TID:$80
- Misfire Cylinder 9 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$aa TID:$81
- Misfire Cylinder 9 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$ab TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 10 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ab TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 10 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ab TID:$80
- Misfire Cylinder 10 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$ab TID:$81
- Misfire Cylinder 10 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$ac TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 11 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ac TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 11 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ac TID:$80
- Misfire Cylinder 11 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$ac TID:$81
- Misfire Cylinder 11 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----
MID:$ad TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 12 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ad TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 12 Data
Max: 65,535 Min: 0
Test result value: 0
PASS
----
MID:$ad TID:$80
- Misfire Cylinder 12 Data
Max: 23.9994% Min: 0%
Test result value: 0%
PASS
----
MID:$ad TID:$81
- Misfire Cylinder 12 Data
Max: 0.99953% Min: 0%
Test result value: 0%
PASS
----


End of report.

 

@Ted928
Thanks for the PM. I thought others might benefit also if I answered here. Hope you don't mind.


Congratulations on getting Torque Pro. It's the best $4.95 you could have spent for an OBDII scanner.


First - you will multiply Torque Pro's value by many times if you will follow the steps I laid out in this post: https://www.ford-trucks.com/forums/1...l#post17338920
Then - (you can add a Vehicle Profile for your 2010 Escape 3L (which uses a bunch of different PID's in completely different ranges from your F150 - ...'darn it'...).
Anyway - back to the problem at hand.

I don't see ANYTHING wrong with your Mode 06 report above. ZERO misfires on any cylinder in the last 10 drive cycles. THAT'S not bad. The "_HIGHEST_" misfire rate that has been registered by the Misfire Monitor (which runs continuously each drive cycle) is 13.827% ---THAT'S within the 0% to 23.9% 'pass' range. That is a GOOD THING. Test ID a1, Completion ID $82 is defined as the "_Highest_ catalyst-damage misfire and catalyst damage threshold misfire rate (updated when DTC set or clears)" REF: Motorcraft OBDII Theory of Operation Manual ..page 11.

It may be misfiring - but it certainly isn't doing it all the time. I'm not saying it is NOT misfiring, but if you haven't done a 'battery disconnect' reset recently, the Mode 06 report above certainly doesn't show it. Since you have Torque Pro now - you might benefit from the Misifre Monitor screen I have developed that is described here: https://www.ford-trucks.com/forums/1...l#post17549804


A couple of valuable misfire PIDs that give a good measure of misfire health are MFTot (Total 'misfire' count during the current drive cycle) and MFF_0_CNT (Count of 'misfire free' drive cycles). I have placed these two gauges on my Torque 'home dashboard' and pay lots of attention to it. My ole 230k mile 2004 model truck almost NEVER shows more than 4 misfires in a drive cycle, and freequently racks up 30 to 40 and once 72 drive cycles without a single misfire. So it IS possible.


In your case - I feel the need for more information before chasing subtle misfire problems. The report suggests any misfire problem would be under certain circumstances and those need to be isolated / understood. If you get a code - be SURE to get "Freeze Frame data" before clearing codes. /// In Fact - I have decided it is not the best idea to reset CEL. That clears a lot of monitor status flags, counters, and other useful stuff that changes OTHER things. The PCM will actually clear the offending code (even pending code) and CEL itself (within two - three drive cycles) if the problem is removed. It's kinda the reverse logic to what everybody normally uses. They Change a part / clear CEL / and see if the CEL comes back on? I've decided I like to change the suspect part or whatever adjustment - and see if the PCM gets 'HAPPY'. With Torque Pro, I can always read codes again and see if they remained the same. In other words, the CEL is not _WHAT_ the problem is. It doesn't hurt the truck to run it ON - it just hurts ME. It can become a useful diagnostic tool though.


I need to review other posts of yours to see if anything can be spotted for you to look at with your new Torque Pro scanning tool.

 

@Ted928
Reviewing some of your other posts I came across a thread that I almost responded to, but @pdqford answered perfectly - https://www.ford-trucks.com/forums/1...l#post17683532


The gradual shift in long term fuel trims are - the adaptive strategy design of things working properly. Ie: tired contaminated O2 sensors OR fuel injector nozzles 'crudded up' with fuel contaminate deposits, the PCM can compensate for that by increasing short term fuel trim, which -if it persists will migrate into long term fuel trim trying to ZERO out short term fuel trim. So as @pdqford aptly said - "it can be whatever it takes to keep the fuel mixture optimized without setting a code" (LTGT > 25% & STFT >5%). Ref: Motorcraft OBDII Theory of Operation Manual, page 30-31. Generally, I don't think your +5 at idle, or +10 to +20 under acceleration is cause for big concern - but deserves watching and eliminating if possible.

Other more troubling things can cause elevated LTFT, such as a loss of compression, or degraded breathing from v.v.t. problems among other things. But I do not have reason at this moment to suspect such with yours.

It _DOES_ sound like your truck is doing the signature misfire under light load 40-45 mph. What is the status of things with the truck? Miles? Timing Components? O2 Sensors Spark Plugs / Boots? Type (model) of spark plugs youre running? Have you ever removed carbon buildup from the extended plug holes in the heads beyond the threads.

Just a personal NOTE: I am NOT an advocate of replacing COPs. They are NOTHING but two windings of wire of different sizes and lengths around an iron core - sealed in epoxy. There is practically NOTHING in them that can go bad with either age or use. 99.9999 % of them replaced is a total waste of time / money. Boots / springs and a 'hospital operating room clean' spark plug replacement job is another story. IMO a MUST.


--- following