[E450TN]

2006 E450 6l starts good and idles good. Then when you apply throttle it begins to stumble/miss hard. No codes-snap on scan tool.
History: began running rough. I was told it was either injectors or high pressure oil issue. Pulled engine- egr delete, NEW: head gaskets w/ stud kit, injectors (aftermarket), complete HP oil system including rail cups, oil cooler, trans flush, glow plugs with control, all wiring harness, all sensors, FICM, PCM, fuel regulator banjo kit, Rotella T6 15W-40 synthetic, all filters (motor craft) added an additional pre-filter/separator (marine grade-installed way prior to issues), 240 amp alternator with over drive pulley, 2-1100 cca batteries, additional block to frame ground, service turbo w/ wicked wheel intake impeller, GlowShift gages- battery, fuel, boost, oil temp, trans temp, turbo exhaust temp, HP oil pressure, and BullyDog- in stock.
I have a video but couldn’t figure how to load. No faith in local Ford dealership. Next closest is ~35 mi.- not sure if I should drive that far and would be major $ for tow. Looking for some help.

 

[Heavy_GD]

Since you have the scan tool get us some PIDs:

Write Up: Monitoring the 6.0L PSD.

I would start the FICM Vs and sync, along with the IPR stats.

Unrelated but also a good read

Sync Troubleshooting (no start, hard start, engine stall)

When having issues, always scan for codes with a good code reader. I HIGHLY recommend downloading ForScan to either a smartphone (ForScan Lite) or to a laptop (full version). You will need an OBDII adapter to use the software. The BAFX BRAND of adapter is inexpensive and the OBDLINK MX+ is...

www.powerstroke.org

 

[E450TN]

Since you have the scan tool get us some PIDs:

Write Up: Monitoring the 6.0L PSD.

I would start the FICM Vs and sync, along with the IPR stats.

Unrelated but also a good read

Sync Troubleshooting (no start, hard start, engine stall)

When having issues, always scan for codes with a good code reader. I HIGHLY recommend downloading ForScan to either a smartphone (ForScan Lite) or to a laptop (full version). You will need an OBDII adapter to use the software. The BAFX BRAND of adapter is inexpensive and the OBDLINK MX+ is...

www.powerstroke.org

I will be back in the shop tomorrow and will get all the info i can gather.

 

[E450TN]

I have registered for FORScan and I'm waiting for my OBDll adapter. should be here tomorrow evening. Will get data ASAP.

 

[E450TN]

Well, I finally got some data:
P115A 3 tests
P1284
P1703
P1780
P2284
P2288
U0100 2 tests
U0155 3 tests

Battery 13.2 v
fuel 67 psi
IPR 84.7 at start 59.7 running
ICP 79 cranking 4377 running
FMP 48 crank 47.5 running

At a tune of $150+ for Ford ICP... problem continues

Pulled PCM inspected pins and plugs. No change
Can PCM be tested?

Don't know what else you might need.

 

[bismic]

Probably:
an ICP circuit wiring issue (v-ref is shorting over to the signal wire it looks like)
a wiring issue in the tow/haul switch circuit.
a brake sensor switch wiring issue.

 

[E450TN]

Probably:
an ICP circuit wiring issue (v-ref is shorting over to the signal wire it looks like)
a wiring issue in the tow/haul switch circuit.
a brake sensor switch wiring issue.

Thanks for getting back to me.
I'm pretty darn good with the nuts and bolts and can hold my own with hard wiring/sensor replacement when i know exactly what needs to be replaced. Going to have to investigate how to check the items you listed. Troubleshooting wiring issues definitely isn't my strong point.

 

[E450TN]

Thanks for getting back to me.
I'm pretty darn good with the nuts and bolts and can hold my own with hard wiring/sensor replacement when i know exactly what needs to be replaced. Going to have to investigate how to check the items you listed. Troubleshooting wiring issues definitely isn't my strong point.

I have been able to verify ref 5v. I'm lost from here. Can you guide me to where I might pick up further procedures? It's crazy... before I ran the FORScan it would start and idle. Only had miss upon accelerate. Now the oil pressure pegs, and the miss is immediate, and I shut it down asap.

 

[bismic]

Regarding the ICP sensor codes: The Brown wire with White stripe is V-REFERENCE. In the harness, it is likely to be shorting out to the SIGNAL wire (not the SIGNAL RETURN). IIRC the SIGNAL wire is the Dark Blue wire with Light Green stripe. The only way to find it is probably going to be by stripping back insulation, but you need to be sure that the ICP sensor itself is not the issue first.

That said, the other thing that you may be experiencing (over 4000 psi when cranking) is that the IPR valve has failed closed).

The dash oil gauge pegging is probably going to be either an instrument cluster issue or an oil pressure switch issue. It has nothing to do with the engine operation and does not represent a problem.

Running ForScan had nothing to do with your current issues.

 

[bismic]

The tow/haul button is on the end of the gear shift lever - comes out of the steering column. The wiring to the tow/haul button comes from the inside of the steering column and runs inside the gear shift lever. Occasionally people experience a wire short inside of that.

Then, you need to identify the sensor on the brake pedal and follow as much of the wiring that runs to that sensor as you can.

 

[E450TN]

Finally got everything tested. Still getting U0100. Ordered new PCM today. Let y’all know next week.

 

[bismic]

It would be good to know what you found and fixed.

Any explanation as to why the SnapOn Solis found no codes, but ForScan did?

I do not have any experience with the Solis, but would have thought that it would be better at reading codes than the way it seems you have experienced.

U0100 could just be battery charge (or cables) or even a poor PCM ground, or an issue with the CAN circuit, or simply when a tune is installed. Sometimes when it is tuner related it clears itself. Not sure how many drive cycles (not just starts) required for it to clear....several IIRC.

U0155 is an Instrument Cluster communication issue, which could also cause a U0100.

 

[E450TN]

Was able to trace and test the ICP harness everything checks out as far as I can tell. Haven’t done anything with the tow/haul or brake issues yet. Didn’t think they could be causing my issue. A couple of the codes issued by FORScan had to deal with the PCM. After what I’ve spent so far I figured why not try it. Installed rebuild PCM today without any change. Bout ready to dig a hole and put us both out of our misery.

 

[bismic]

When you say the oil pressure is pegging (post #8), did you mean the dash gauge is pegging or the ICP pressure?

If the wiring is ok, then a P1284 means that the connector or the sensor is bad. I would imagine even an aftermarket ICP sensor could cause this if the voltage/pressure calibration was different.

It almost never is the PCM, so not really surprised there.

Please describe exactly what it is doing when it "misses". Do you see ICP volts change? IPR % duty cycle change? rpm's change?

 

[E450TN]

When you say the oil pressure is pegging (post #8), did you mean the dash gauge is pegging or the ICP pressure?

If the wiring is ok, then a P1284 means that the connector or the sensor is bad. I would imagine even an aftermarket ICP sensor could cause this if the voltage/pressure calibration was different.

It almost never is the PCM, so not really surprised there.

Please describe exactly what it is doing when it "misses". Do you see ICP volts change? IPR % duty cycle change? rpm's change?

 

[E450TN]

I’ll be heading to the shop in a bit and will get answers for you.

 

[bismic]

Those ICP voltages and ICP pressure values don't match. I would question the sensor.

 

[E450TN]

The ICP sensor was replaced a couple weeks ago from Ford same issues before and after replacement.

 

[E450TN]

Sorry about all the attachments. I’m not so good with this stuff.

 

[bismic]

I guess 1.07V and 805 psi aren't all that far apart.

The 2.2V and 1020 psi is what was fairly far off. 2.2V should be more like 1650 psi.