Truck is an 06 screw 5.4 with 220k. Replaced all timing components roughly 10k miles ago. Also changed coils and plugs.

Was driving down the highway and all of the sudden it was like I lost two cylinders and the truck refused to throw any codes. I limped it home and when I got in the driveway the CEL finally came on and this is what I got. Having trouble trying to figure out what is going on.

Checked all injectors and coils with a noid light and I'm getting signals from the pcm. Swapped coil on cyl one with another and it didnt follow. I'm not extremely knowledgable about diagnostics but I would rather not pay a shop to chase my issue. If you guys have any insight I'm all ears.

Forgot to add my fuel trims on bank one are showing rich but I'm assuming it's due to the misfire.

 

Changed my two month old vct solenoids but that didnt help. Kinda lost on this one and surely someone on here has had something similar happen.

I was playing with the forscan app looking at different sensors to try and help narrow down the search for the problem and noticed my spark advance is all over the place at idle. It seems to calm down with higher rpms but still feels like I might have a dead cylinder. Truck is refusing to throw codes after clearing the originals.

 

02 sensor detects oxy . you should have too much o2 meaning a lean fuel condition- misfires pump air . Thats a lot of primary failures but noid light is working yet you are still setting misfires . clean all cop connections/ clean springs get dielectric grease off connections . . check your grounds for cops . Thats too many to be cop failures . Sounds like corrosion to me .
Did you use oem phasers.

 

Are these orig injectors . I change mine at 100k .I only use new .I don't want to experience hydro lock . Dorman phasers and cnc stuff not good . Theres a reason oem phasers cost is high .
I wonder what your mode six report is like for misfires by cly and the raw count versus the minimum to set cel . Do you smell fuel at tailpipe /black stuff .

 

Negative fuel trims means it is trying reducing fuel ,positive means its adding fuel .I confess I don't know how to read forscan . I'm wondering about leaking injectors .they can be very destructive. .

 

@redfishtd is exactly right. "O2 sensors detect oxygen". With the multiple P035x codes (which are NOT misfires BTW) - the cylinders become a big air pump. After a stroke that didn't fire because of primary circuit problems (P035x), the PCM will shut down injectors on that cylinder. One would think the O2 sensors would sense tons of excess oxygen. However ---- knowing that will 'screw' fuel trims all to heck, I would just concentrate on eliminating the three hundred fifty series DTCs.

The PCM has the ability to detect 'open circuit' and NO current in the primary when it grounds the control wire of each COP. In a similar fashion, the PCM can sense the 'reverse emf' created when the secondary winding in the coil collapses causing the 'spark' across the plug tip. If either is missing, it is viewed as a 'primary or secondary circuit problem'. Even though we know that no ignition could have occurred, it is NOT A MISFIRE.

Since you have P035x on multiple cylinders - I would NOT suspect secondary winding problems or bad COPS. And I would not suspect simple poor connections on the COP primary plug not being snapped on good. ALL COPs are feed by one common +12 volt source with their control wire grounded by the PCM to fire the plugs. Seems to me you could have a 'flaky' electrical connection somewhere in the +12 volt feed to COPs (perhaps fuse, or at fuse block, or ignition switch or some plug in that electrical circuit.

I'm not sure, but a scratchy / flaky electrical connection might be the source of your ignition timing advance bouncing all over the place. I believe THAT is the most likely cause of your rough idle.

 

F150torqued thanks for the info I will definately try tracing the wires all the way back to the battery. One would think this would be intermittent if it was a poor connecting or insulation wearing on a wire. My problem seems to be extremely consistent. Sounds like I have some big ole cams in it and its loping. It does seem to get better with higher rpms but the "miss" stays consistent.

 

Redfish I did not use ford phasers and to the best of my knowledge they are the original injectors.

 

'The "miss" stays consistent' ???

I'm basing my opinion entirely upon the OBDII report. I trust that. The PCM is closest to the situation. The P zero-three-fifty series is quiet specific. I suppose, theoretically, the failure could be in the electronics in the PCM that detects continuity in the COP circuits --- AND/OR --- the diodes that allow detecting the reverse kick from spark plug drawing current in the secondary winding. Seems hard for that to effect all 8 circuits. I've never seen that, or heard of that specific kind of failure.

But something significant here is that you indicate you checked COP circuits with a 'noid' light. I have NO faith in noid lights - (Because they don't verify the circuit is capable of carrying required current). Believe it or not, the COP's draw six amps when the PCM pulls the control wire to ground. Noid lights (being LED) will light with milliamps current in the circuit. A loose / poor connection in the circuit somewhere will result in a BIG voltage drop across the connection when the PCM grounds the control wire. The effect of that would be like running the coils on six, eight, or ten volts. Perhaps not enough to produce sufficient reverse emf for the PCM to detect it when / if the plug fires. I can envision that a high resistance connection in the common COP supply circuit - before the breakout to bank 2 - would cause exactly the problem your scanner shows.

The erratic ignition advance is a problem - and I believe responsible (somehow) for the rough idle. COULD the ignition problem be responsible for this??? I suggest it could. And I think the U-codes are also related. I know the P035x is not normal. I would concentrate on removing that ---- THEN see where else to go after that.

Since you have at least one misfire (a very different situation), you might 'try' swapping that COP with an easy to access one on bank 2 and see if it makes any difference.

Good Luck. Keep us posted. It's an interesting problem..

 

Looked over all the harnesses/pcm connectors/fuse panel. Could not see any visisble harness damage or push backs on connectors. Had the intake off so I was able to get a good look at harnesses in the back of the motor.

Could knock sensors or crankshaft sensor be contributing to the problem?