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  #1  
Old 09-25-2013
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whats this noise?

my truck kicked the egr code. "egr has too little flow" something like that. But anyways the egr valve is good and i changed the egr sensor. When i am about 1/4 throttle there is a high pitch squealing sound. but once i get to about 1/2 throttle it goes away. also this noise only happens when i have a load on it like going up hill. I checked the vacuum hoses with a propane torch and had no spike in the idle. im so lost.
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Old 09-25-2013
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I would check the tensioner pully just my .02 but with out hearing it I can't tell you for sure
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Old 09-25-2013
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I solved my vacuum problem with a dpfe sensor. Sound is still there, but now I have a p1309 code. I replaced the camshaft syncronizer and sensor two months ago. What could it be?
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Old 09-25-2013
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Found this on google...

The code P1309 usually sets because the CMP synchronizer is not installed properly, and is "out of time".

If the special tool for installing the synchronizer is not available, the synchronizer must be installed with the crankshaft at 26 degrees AFTER TDC on the #1 cylinder COMPRESSION stroke. To find 26 After Top Dead Center (ATDC), set the engine at TDC of #1 compression stroke, then watch the teeth on the Crankshaft Position (CKP) sensor tone ring on the front of the crankshaft. Turn the engine by hand until an additional two and a half teeth on the tone ring have passed the CKP sensor. This will be 25 degrees ATDC (you can estimate 1 more degree from there). Then install the synchronizer so that when it is bottomed out, the skinny vane that rotates through the sensor is centered in the sensor opening.

Once the synchronizer and CMP sensor are installed, the misfire profile will need to be relearned. To do this, verify that the fuel level is between 1/4 and 3/4 tank, then drive the vehicle, and do 3 or 4 decelerations from 65 MPH down to 40 MPH without touching the brake pedal.

Hope it helps
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Old 09-26-2013
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I don't think I put it in wrong. But I never did the relearn part also could it be plugwires?
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Old 09-27-2013
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I don't think plug wires would cause a squeal check your wires for cracks and places where they may be arcing
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