Having issues with my truck. Loud rattle when engine heats up and eventually stalls out. Replaced timing chain, tensioner , guides , phasers, oilpump and same thing happens. At a stand still now. Any suggestions? Starts up fine when cold and runs/idols fine until it heats up.

 

Overheating? Any codes?

 

Did you replace the VCT solenoids?

 

05 you can replace pretty easily if you didn't already. Also can unplug them when having the issue and see if it gets better as a kind of test.

 

Not always. I too have an 05 5.4 and the seals would not budge for the VCT solenoids. I had to remove the valve covers and knock them out from the rear.

 

Well that sucks. I guess you're supposed to be able to change them out easier than 07+ models LOL.

 

P0010
P0012
P0020
P0021
P0340
I tried taking off the solenoids and no change.

 

Dirt in vcts-- clogged open, vct housings with sludge in them . . Did you clean out oil pan and oil pickup screen when oil pump changed . Are these oem parts you changed out phasors etc.
If guides were broken you can bet the oil pan is full of plastic debris .

An off brand phasor just caused some problems on another thread .
This problem can be caused by using a motor flush and breaking loose a bunch of sludge in the system . I caused this when pre- cleaning motor prior to rebuilding timing parts . I knew it could but the engine was already in deep trouble .

 

^^^ X2.


As an additional note, you can probably ignore three of those DTCs (P0010, P0020, and P0021) as you caused them by unplugging the VCTs if you drove it that way. P0010 & P0020 indicates an 'open circuit' on both banks VCT circuits. PCM is pretty smart. Of course they were open, they were unplugged. Then when the PCM requested retard (immediately after you took off), the VCTs couldn't tell the phasers to _retard_ because they were unplugged. They were at base timing (advanced), so at least bank 2 was 'over advanced'. [Bank 1 may be retarding ok - but NOT returning to base properly].


That leaves P0012 and P0340, both Bank 1 DTCs. @redfishtd 's theories are probably correct. Clogged / flaky VCT could hamper Bank 1 phaser preventing its proper return to base timing (leaving it over retarded). Improper breathing / can result in over rich condition on Bank 1 and result in a P0340 (catalyst efficiency). I would put that one on the back burner and concentrate on timing component DTCs until they are removed. I agree - start with VCTs