I have P1309 ,p0340 codes. Replaced synchronizer and sensor. Set at TDC-
installed location tool 303-562 T96T-12200-A. Reassembled. Still have same codes! Disconnected CMP. Truck runs better with out connection!
Can someone please help with any Ideas. I'm stumped!!

 

This is an interesting problem.
First, if you only had the 340 code, it would be the cam sensor.
Since you replaced it and the code is still there, the 1309 is the real cause.
There is likely a harness issue that is causing noise in the sensor signals.
The cam sensor controls accurate fuel injection.
Noise can have a wider effect on total operation.
The harness from the crank and cam sensors are shielded for that reason.
Look them over good.

Good luck.

 

Thanks for the reply!
I went through the pin point tests from the ford OEM Manual, although I don't have a oscillocope, and found no shorts or open connections.
I will check the shielding as per your suggestion. What is used for shielding?
Can I use rubber electrical tape or do I need something thicker?
Thanks, Roger

 

Shield in this case means electrical.
It's a woven metal cover or a metal tape cover that is grounded to prevent picking up noise signals along with the sensor signal.
The PCM can respond to noise because it does not know the difference and causes wrong logic results within the system program processing.
It's not any standard type insulating tape as you know it.
Good luck.

 

Bluegrass,
Thanks to your suggestion to check my wiring I did find my transmission harness had come away from the anchor to the fire wall and fell close to the exhaust manifold and EGR tube. The heat from being to close melted the shielding and wire insulation.
I don't know if this is contributing to my problem but it was a definite problem!
I tried to purchase new harness from Ford but it is now obsolete.
Found one at a junkyard but have to pay prior to them taking it out.

 

I have P0340 codes. Replaced synchronizer and sensor. Set at TDC-
installed location tool 303-562 T96T-12200-A. Reassembled. Still have same codes! Disconnected CMP. Truck runs better with out connection!
Found transmission harness fell onto exhaust manifold and burned off most of insulation on about 10 wires. Pulled harness out and spliced all 32 wires.
(8hour Job!). Reinstalled Harness, (this is not the harness the CMP sensor is on) still getting 0340. Did pinpoint checks according to Ford manual. verified CMP is working. Found NO shorts or opens in (CMP)harness.
Could it be PCM?
Could it be CKP?...or some other sensor?
Any Ideas anyone??!!!

 

According to this it could be the ckp

OBD-II Trouble Code: P0340 Camshaft Position Sensor Circuit Malfunction

 

The code 340 is specific to the cam position sensor.
If the PCM does not see the input signal the assumption is a fault leading to the code.
Be sure before you go through the hassle and expense of changing the PCM because it's expensive.
You should get a copy of the Haynes manuel from an auto parts store or at least go and look into one for a few minutes.
Look at page 12-21.
There you will see the wiring for the cam sensor.
You will see it powered by a common red that supplier many other places.
As well you will see the sensors has a lead that is common to 5 other sensors plus other locations.
The ground is shown as well as the lead to the PCM.
The dashed lines is the harness shield.
Seeing this info, make very sure your not missing something.
A ground or open anywhere in the sensor's circuit will render it a no output to the PCM.
Remember you had a 1309 code that suggest an intermittent ground or open and now may be a solid ground or open circuit.
Best I can do is offer you this extra info to work with.
Good luck.