Need HELP!

[CHSimon3]

Looks like the short term fuel trim is almost maxed out in the negative. That would imply the egnine is getting fuel from somewhere other than the regular injector function or that air is heavily restricted.

Maybe a faulty or too large of an injector? They they said they were OEM, Denso not Motorcraft. Or not getting enough air to it. I've done a smoke test as well and can't find any leaks.

 

[pjtoledo]

cylinder 1,2,3 look normal. 4,5,6 are really fouled.
that definitely means you have a problem with bank 2, the drivers side.

swap the O2 sensors between sides. look at the wiring.
or something is shorting those 3 injectors to ground.
try unplugging the 02 sensors, what happens?

try unplugging those 3 injectors and start the engine. it will run horrible but should not smoke.

last but not least, double check the plug wire order. look at the markings on the coil pack.

 

[CHSimon3]

cylinder 1,2,3 look normal. 4,5,6 are really fouled.
that definitely means you have a problem with bank 2, the drivers side.

swap the O2 sensors between sides. look at the wiring.
or something is shorting those 3 injectors to ground.
try unplugging the 02 sensors, what happens?

try unplugging those 3 injectors and start the engine. it will run horrible but should not smoke.

last but not least, double check the plug wire order. look at the markings on the coil pack.

O2 sensors were changed just after I got that data, the old ended up throwing a code for stuck rich. I'll record another set today. And if you still think unplugging or swapping them over. I'll do that.
I'll unplug bank 2 injectors and let y'all know what it does. Not getting any circuit fault codes on injectors. But I'll check the harness with a multimeter and see if I can find any shorts.
Oh, and plug order on coil from front of engine to back is 1,5 2,6 3,4

 

[pjtoledo]

another long shot, I mean a really ridiculous na' that can't possibly be it long shot....
is the driver side valve cover filling with oil? not draining back to the pan? pull the PCV valve and have a rag handy.
along that path of brainstorming, valve seals? unlikely, but an oil-flooded head will leak oil past good seals.

hey, at least this stuff is cheap to check.

yes, excess oil should also drain back thru the pushrod holes, but they are higher than the drain holes so quite a bit
of oil can accumulate if the drain holes are blocked. your plug 6 is the worst, it's also the lowest.


side note: cat converts can't differentiate between excess oil or gas. in their view both are fuel and the PCM will do strange things
to the fuel trim while oil is overwhelming the system.

again, all this is a lonnnnng shot but it's worth looking at.

 

[CHSimon3]

So far, I attempted unplugging Bank 2 injectors. Truck doesn't even try to run without adding throttle. Too difficult to keep running and watch for smoke.
I did recheck fuel pressure KOEO= 60psi and KOER= 64psi Now, I don't know how much ambient temps come in to effect on pressure. When originally I got 44psi and 50psi.

 

[CHSimon3]

another long shot, I mean a really ridiculous na' that can't possibly be it long shot....
is the driver side valve cover filling with oil? not draining back to the pan? pull the PCV valve and have a rag handy.
along that path of brainstorming, valve seals? unlikely, but an oil-flooded head will leak oil past good seals.

hey, at least this stuff is cheap to check.

yes, excess oil should also drain back thru the pushrod holes, but they are higher than the drain holes so quite a bit
of oil can accumulate if the drain holes are blocked. your plug 6 is the worst, it's also the lowest.


side note: cat converts can't differentiate between excess oil or gas. in their view both are fuel and the PCM will do strange things
to the fuel trim while oil is overwhelming the system.

again, all this is a lonnnnng shot but it's worth looking at.

Pulled PCV valve and it looks ok, and it is functioning. Doesn't seem like excess oil coming through. I suppose i can pull the valve cover to verify.
As for valve seats, I think they're good. Heads were replaced and compression test after showed 160psi +/-4 across all 6 cylinders.