I have an 06 5.4 with 120k miles that has just started shuddering very badly, I am not sure if it is from a misfire or not.

What I do know is:
1. It happens at random during idle. (like one random miss then smooth for a bit then random miss)
2. It is worse at idle when the A/C compressor is engaged.
3. The RPM dip slightly when the random miss/ shudder happens.
4. It only is noticeable while moving when the engine load is grater than 60%.
5. It is less noticeable with higher rpm but it is still there.

My plugs and coils were replaced at roughly 75k miles and I am at a loss for what this could be or where to start with it. Any help would be appreciated.

 

Job #1 is to pull any and all codes - including pending ones that may not set a CEL ( and for which you may need access to an advanced scanner that can display Mode $06 data ).

Then - post 'em up and we can go from there.

FWIW - top three causes fer misfires: plugs, COPs, injectors - secondary causes - bad COP boots, lean conditions ...

good luck

 

There is no CEL and my php gryphon did not pull any codes (I don't know if that would work for what you mentioned or not.) Do I need to go to a dealer to have that done or can auto-zone or somewhere like that do it? I actually had the truck on a dyno a year or so ago to make sure it was not running lean (just for peace of mind) and every thing came out correctly. I haven't made any changes to the truck since then so I would assume its still good.

 

And now that I think of it, there were isolated times in the past where it would randomly start to shudder and sound like a miss at idle. It would happen infrequent and very random at a stop light or something like that but as soon as I would take off again it would go away and not happen again for months. I never paid much mind to it as it was so infrequent and random I could never reproduce it and was in college at the time and couldn't afford (money or to be without a vehicle) to take it in to a shop to diagnose and repair. That hasn't happened in almost a year until now, and now it is constant.

Thank you for the quick response and insight.

 

Hey.

Gryphon can't access Mode$06 data / pending misfire codes. Nor can Autozone.

You need either a Dealer diag, a competent shop with the right equipment, or IIRC Torque Pro.

Without the codes to identify the specific offending cylinder(s), it becomes a fruitless tailchase and potential parts-throwing contest.

Spending a little up-front can save a lot later as unaddressed misfires will eventually lead to $$$ in downstream damage repair costs.

good luck
MGD

 

I'm having the EXACT same problem. It kind of idles like a drunk chick walks. Normal normal normal bump/shutter normal normal normal....No codes at all. Its worse when the motor gets warm or you put it in drive immediately after start up (which I don't do). It's definitely worse when the A/C compressor kicks in. Seems to still be there in all RPM ranges but is just more noticeable at low RPMs.

I replaced all my plugs and boots about 6,000 miles ago. Resealed my air box, cleaned MAF and TB. Did a pcm reset, replaced fuel filter, searched and searched for a vac leak to no avail.

Torque Pro doesn't register any misfires in the "Total Misfire Count". And I'm unsure how to access the $06 in there although I do know what to look for when I figure it out. Fuel trims are reading fine in torque, cat temps are fine, fuel rail pressure is fine, advanced timing is fine. I took it to Ford and before they even looked at it they said it was time for a new motor... BS. Took it to a independent mechanic and he couldn't diagnose anything. Also, I'm not burning tons of oil judging by good oil levels and normal dry soot in the tailpipe.

If I have any updates I'll post them here for you. And I'll be following this thread so if you get it worked out please post the resolution. Thanks!

 

Had very similar problem. Mine was vacuum leak on intake manifold.

 

Finally figured out how to get the. $06 data from torque ( you just let the test results finish... Duh). Here's the data dump. The only this I can see is total misfires is above 1%. None of the cylinders are reporting any misfires though.


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

Vehicle VIN: 1FTPX145X5FA85164
Vehicle Manufacturer: Ford
Vehicle Calibration ID: RXCM5A6.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: 0.71675V
PASS
----
MID:$01 TID:$81
- O2 Bank 1 Sensor 1
Max: 3A * Min: 0.23A
Test result value: 0.518A
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: 0.5A
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: 0.72004V
PASS
----
MID:$05 TID:$81
- O2 Bank 2 Sensor 1
Max: 3A * Min: 0.23A
Test result value: 0.501A
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: 0.484A
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: 0.68749Ratio * Min: 0Ratio
Test result value: 0.13672Ratio
PASS
----
MID:$22 TID:$80
- Catalyst Monitor Bank 2
Max: 0.63671Ratio * Min: 0Ratio
Test result value: 0.03125Ratio
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: 831.25Pa * Min: -8,192Pa
Test result value: 0Pa
PASS
----
MID:$3c TID:$80
- EVAP Monitor (0.040")
Test incomplete or dependant test failed
--
MID:$50 TID:$0e
- O2 Heater Monitor Bank 4 - Sensor 4
Max: 0 * Min: 0
Test result value: 48,000
FAIL
----
MID:$a1 TID:$80
- Misfire Monitor General Data
Max: 24.37785% * Min: 0%
Test result value: 0%
PASS
----
MID:$a1 TID:$81
- Misfire Monitor General Data
Max: 0.99953% * Min: 0%
Test result value: 0%
PASS
----
MID:$a1 TID:$82
- Misfire Monitor General Data
Max: 24.37785% * Min: 0%
Test result value: 16.16797%
PASS
----
MID:$a1 TID:$83
- Misfire Monitor General Data
Max: 0.99953% * Min: 0%
Test result value: 1.64808%
FAIL
----
MID:$a1 TID:$84
- Misfire Monitor General Data
Max: 966.60004°C * Min: 0°C
Test result value: 532°C
PASS
----
MID:$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:$80
- Misfire Cylinder 1 Data
Max: 24.37785% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 2 Data
Max: 24.37785% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 3 Data
Max: 24.37785% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 4 Data
Max: 24.37785% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 5 Data
Max: 24.4984% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 6 Data
Max: 24.4984% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 7 Data
Max: 24.4984% * Min: 0%
Test result value: 0%
PASS
----
MID:$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:$80
- Misfire Cylinder 8 Data
Max: 24.4984% * Min: 0%
Test result value: 0%
PASS
----
MID:$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

 

Was it the connection on the very back bottom of the intake by the CVCM motor? I can't for the life of me get back there to even check it. Were you getting any indication in your fuel trims?

 

Also, my FPDM was just replaced about 2 months ago. No change in the problem.

Sorry to hijack this thread but I'd like to see us both get this fixed. Might be quicker with twice the data.

 

No, up front on Bank 1 side. No Fuel trim variations.
t. Sprayed the heck out of it with carb cleaner, once a week for 3 weeks. finally got bad enough to suck some in.

 

I am taking mine into a shop in the morning to have them at least look at it. The shudder makes it unpleasant to drive and I can feel a difference in power with it in that state. Trying to merge onto the highway and stop and go down town I might as well have been in a prius.

 

Shop just called, said that the #8 coil is bad. Also said the Gryphon is causing many other problems and that it should be removed. I'm not sure about any of that. But they wanted 150 to replace the one coil, so I am going to pick one up on my way home and just do it my self this evening.

 

---ok, I have a 07 with the 5.4 and mine does the same thing, I looked it up on all data and there was a TSB for the vct solenoids (variable cam timing) it said these solenoids go bad and can cause a shudder like that. If it doesn't throw a code, chances are it's not a misfire. I hope that helped, oh one more thing! Does it only do it at idle? Does is go away when you bring the truck off idle?

 

It does it at Idle and when moving with engine load above 60%. Took it into the shop this morning and they came back with a bad #8 coil. They moved that coil to a different plug and said the problem went away (but that's a temp fix) I'm going to buy a new coil tonight on my way home. Thanks for the input though. Just another problem to look out for.