6.0 Missing Above 2000 RPM
 

So I had an EGR Cooler leak a few weeks ago which I had fixed by a garage and no issues. After that since it started as a head stud scare I got an Edge CTS monitor system. The system was showing my EGT and ECT's running as much as 42 deg F apart. I was hoping to do the Bulletproof system but I replaced it with a new stock oil cooler because of the $2000 cost difference. I did the work on the oil cooler myself. After putting everything back together I am having an issue where the truck runs normally below 2000 RPM. At around 2000 RPM and above the engine misses and won't rev higher. I can push it but it just misses worst. Every once in a while like 3 out of 10 trips the truck will run normally above 2000RPM but only after its been run for a bit and is warm. The edge monitor is showing the following codes.

P0336 Crankshaft Position Sensor A Circuit Range/Performance
P0341 Cam Shaft Sensor Circuit Performance

The 341 code showed up once and I deleted it and it never came back. The 336 code comes back every time the engine misfires.

I have an Banks intercooler, intake elbow, air filter, two optima yellowtop batteries that are about a year old. I also have a coolant filtration system. Other than that the engine is stock. I do not run any kind of a performance program.

I pulled the data from the Edge CTS and after a long time of mixed driving these are the numbers I'm seeing.

ICP at Idol 587.5804934 psi
ICP Voltage at Idol 0.856178767 V
RPM at Idol 694.5850898 RPM
FICM Voltage at Idol 49.51873536 V
Average Speed 51.52563629 mph
Max Speed 78.363 mph
Average RPM 1627.235133 RPM
Max RPM 2796.25 RPM
Max ICP 4.232 V 2700 RPM
Max ICP 3715 psi
Max FICM 50 V
Average FICM 49.4 V

From what I have read all of these numbers seem normal. I am really stumped with this one. I purchased a CKP sensor and went to replace it and found that it is near impossible to get to. I can go about taking the front off the truck and trying to get to the sensor but I am trying to figure out why it would start giving me issues all of a sudden.

Codes p0336 & p0341 won't go away - Page 2 - PowerStrokeNation : Ford Powerstroke Diesel Forum

What's the IPR%? It's pretty common for it to take a nose dive after an oil cooler replacement. Might be contributing.

Yes^^^^

An IPR is common to die after Oil Cooler work

Post these at KOEO, Low Idle, High Idle (2500rpm) in park up to Normal Temp

ICP
ICPV
IPR%
FICM MP
FICM LP
FICM VP
FICM SYNC
RPM is this one jump all over and really erratic reading
VOLTS
CMP/CKP SYNC

If you have a DVM we could check the Crank sensor more thru the wire harness

P0336 CKP Crankshaft Position Sensor A Circuit Range/Performance
Possible Causes are= Circuitry, CKP sensor, electrical noise

[***************][***************]Crankshaft Position Sensor Malfunction Thresholds:
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P0336 – Powertrain Control Module monitors the Crankshaft Position Sensor (CKP) sensor signal for a

unique valid pattern used to indicate piston position. Checks for the absence of the CKP signal. (Crank Mode

– 5 errors, Run Mode – 10 errors).

If you want to go further into it, disconnect the middle PCM connector and plug it back in again.
Make sure it is secured to the PCM properly (since you mentioned you had disconnected it during the repair).
If you want to verify those circuits, you can connect a DVOM to both the CKP and CMP circuits of the middle PCM connector.
Set your DVOM to Hz. On the CKP circuit, you should be seeing 150 to 200 Hz when the engine is cranked over (directly proportional to 150 to 200 RPMs).
On the CMP circuit you should get a reading of 1.1 to 1.9 Hz when the engine is cranked over. Hopefully you won't have to go this far before you resolve your issue.
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The spec is between 300 to 400O for the CKP sensor, and 800 to 1100O for the CMP sensor. If you want to check readings, set your DVOM to read Hz.
The CKP reading you should be getting from the CKP sensor, is between 150 to 200Hz, directly proportional to engine cranking RPM when the engine is cranked over.
The CMP reading should be between 1.1 to 1.9Hz when the engine is cranked over.
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connector C1381t

Camshaft
Pin# 31 Camshaft +
Pin# 43 Camshaft -

Crankshaft
Pin# 30 Crankshaft +
Pin# 41 Crankshaft -