Ford Repair Questions? Ask a Mechanic for Answers ASAP
Hello and thank you for your question,Where you having this problem before you replaced the synchronizer?Did you also replace the sensor as well use the alignment tool when you did this repair?
It sounds like your synchronizer is still off and that can affect the timing. I would go back in and recheck the synchronizer alignment. See the factory steps in the link below, look then over and make sure these are the steps you are following and recheck the install.Copy and paste the link to your browser to open and view the link.https://dl.dropboxusercontent.com/u/104923897/synchronizer%20Oct%2012.pdf
Well then I would go back and line everything back up and recheck the alignment, its not likely your 180 out because it would not run, its more likely your a tooth off. One tooth off would affect base timing just like you are describing.
No it should show steady at Idle and advance after when you raise the RPM
If the camshaft where out of time it would affect engine compression and in most cases the engine would not run or barley run .
The code P0340 will set every time if the synchronizer is misaligned or the sensor is bad . If the sensor is new then Its not likely the problem, it sure sounds to me the the synchronizer is off .
Okay, I'm here if you need me.
The best way to located TDC on the #1 cylinder is to have a helper bump the engine over while you hold your finger over the empty spark plug hole till you feel compression air coming out, once you feel compression then place your screw drive in the hole and turn the engine by hand and once the screw drive is all the eay p and not moving down then you are at TDC. You should also see the timing mark on the harmonic balance which should read 0 when the piston is at TDC on the compression stroke. With engine at top dead center the synchronizer with the alignment tool installed will only fit one way.
Where does the knock sound like its coming from, The lower end?
I have to wonder if you have a problem with the oil pump especial if the gear on the synchronizer was stripped out. Something had to stop turning to usually make this happen. The cam gear turns the synchronizer and the oil pump.
You may be okay if it has not seized again. I just hope the loss of oil pressure did not damage any of the engine bearings. Cant say for sure because I can not hear the knock , just my first guess. Hopefully I'm wrong.
Does it speed up with RPM?
From your description it does not sound like you dont want to ignore it for sure. Usually that sort of noise is caused by a rod bearing.
No but if the oil pump seized, the cam would have kept turning as well as the synchronizer and that would normally shear the gear on the synchronizer. If the oil pump did seized up you would have lost oil pressure and if it was drive to long that would damage the bearings and that could be the knock your hearing as well.