Hi, after running for about 20 minutes or so the engine starts to run really rough, At times I can turn it off, restart it and it runs fine.

I replaced the phasers, both vct's and all the coils about a year ago.

I just finished installing a new piston and rings, tensioner gaskets, all new connecting rod bearings, replaced the left head, new head gaskets and bolts, replaced the right exaust manifold, intake and the imrc.

I am at a loss as to what may be causing the rough running. Can anybody make any sense of what might be causing it from looking at the information below?

I am also getting an error from my oil tempurature monitoring sensor, This is caused by the connector coming unplugged, but I was also wondering if this could cause any other issues other than the cel coming on?


This is what I get from Forscan when it is running rough with everything attached


This is what Forscan shows when the truck is running fine with and without the VCT solenoids connected.


This is what Forscan says when the truck is running rough and the VCT solenoids are disconnected.

 

***UPDATE*** Have tried new phasers, VCT solenoids, swapped cam position sensors side to side and still have the same issue. Weird thing is that when I unplug all 4 coils on bank 2 (the bank that has the out of wack timing) there is no change in the running of the truck.
Not sure what the heck is going on. Is it possible that it may be electrical or maybe the PCM?

 

I'm no guru but if the cam timing is off by 50 degrees from the ignition timing it's probably not sparking at the right time to combust so no wonder it runs bad. So when you unplug the vcts when it's acting up I see the error goes down a bit but the cam timing is still way off. Does it improve how it runs when the vcts are unpluggd at all?

 

Did you use ford phasers?

 

Yes. I have tried 3 different phasers, one Ford and two after markets and no difference.

 

Yes. I have tried 3 different phasers, one Ford and two after markets and no difference.

 

so it looks roughly the same when it's running rough with the vct connected as it does when they are disconnected. So maybe you have an intermittent wiring issue, but shouldn't both sides show the same fully advanced with the vcts disconnected and this locked in the advanced position?
Were your reading you show all taken at idle?

 

Yes, all reading are taken at idle. Today sometime I am going to rerun all all test with both vcts disconnected as well as each vct disconnected separately.

 

I was going to ask about idle or at what rpm . May i suggest a run at 2500 rpm ,one running good another not .
From my meager experience reading these . It looks like passenger side- bank one at idle at 59degrees . At idle vcts should not allow any flow- no movement of phasors it should be locked .
Is there sludge in this engine . I know I failed to clean out vct bodies when i did mine . I have since found out they have a small filter in them . I did do an engine flush when i tore mine down so I mostly had varnish . I still do an engine flush every other oil change and i run marvel mys oil 1 quart .
Do you have plastic tensioners or the old style steel tensioners. The old stlye don't have seals to blow out . I'm just thinking about an oil pressure leak .
For some reason i'm thinking passenger side phasor is not returning to base all the time . Is a vct port leaking . I think the spring helps it return for the pin to lock ,I would guess the oil pressure tries to push it back also but i could be wrong . I'm weak on that part .

 

I see you are in Calgary Canada. Sludge in those cold climates are some of the worst i ever saw. Chocolate cake frosting thick , short trips getting to near 200deg f then cooling to below freezing each night -no chance to get condensation out of oil thru vapor boil off . can't do oil changes by miles or way less than 5k miles, must use synth oil low vis ,frequent oil changes and engine flush . Do a long drive once a week .
I really don't have a good answer that is tested because I lived in Florida for 50 years .