redfishtd

There is a problem you can work on . Carbon build up in cyl around the tip . Seafoam isn't going to get it out, use a small rag soaked with carb cleaner on a bent wire coat hanger made like a gun bore tool . This carbon causes heat range of plug to change and can break new plugs going in .
If you do use nickle anti seize use very little and avoid any near tip . Some guys say not necessary with new plugs if you clean out carbon .
Torque wrench plugs in 25 to 28 psi don't go by feel . Change them before 50k . Always use new boots and dielectric grease . Avoid anti seize on plug threads as it is part of the electric path of the coil high voltage to steel ground .
You may want to clean connectors on number 2 coil and injector .
Spark Plug wells must be clean and dry .

nrivera04

Have you checked the connector going to the coil? Over time, corrosion, connection, etc.

Check voltage at the plug, look for corrosion, and maybe even peel some of the loom back and inspect the wire if possible.

brandxn

Took the intake off because it sounds like there is air improper seal or a leak and this is what cylinder two side looks like under neath the intake. Why would it be so clean?

redfishtd

I never have had my intake off . So I can't really relate to the parts . Its definitely indicating a problem . Are those flappers on the intake runner control which changes the air flow in manifold to rebalance it from low air intake to high . Does the #2 flapper move with the rest of them ? I know the control is a frequent vacuum and linkage problem discussed on here .
Air flow usually makes the surfaces black such as the throttle body . This one is not sharing in the air flow or is being cleaned with fuel . I would doubt its being cleaned with fuel since you changed injectors . If it was leaking it could cause real engine damage well as cat damage . . Or is combustion cleaning it, meaning a valve problem .
I have heard of sticking valves on this engine ,a mechanic was just relating to me a stem sticking he had on one . . Its going to be a really good engine guy to spot this one . There are a few on here.
Thanks for the pictures I would never have guessed it would look like that .

quinner30

I would replace the intake gasket and get that thing back together, then, 1 at a time, swap the coil and injector with the cylinder next to 2 and see if the problem moves with a quick test drive. Your picture would have me thinking about an injector that is sticking open, and dumping too much gas in.

brandxn

I am also going to replace the intake. We also noticed that there was a little peice in there that is broken, as well as the corner of the right side circled in orange, looks like it's been melted as well as something hitting it or hogging it out. You can see both the issues when you compare it to the one circled in red.

redfishtd

With the flapper being so clean and this damage I would think another intake may suffer the same fate . Thats my two cents ,I know those plastic intakes are around $200 or more .
Perhaps that injector you just replaced had been dripping , you can put them back in fuel rail and turn key on and nothing should drip .

brandxn

Finally took the truck in last week and had the mechanic tear into it after a compression test showing cylinder 2 being much lower than the others. There are some serious issues going on regarding the valves, the moral of this story is that it pretty much needs a new top end and the motor has to be pulled. $$$$$

redfishtd

I have been studying adding a cleaning tank to pcv circuit because of black gunk building up in intake and around valve causing them to stick. This may be a contributing factor . Maybe someone else has a way to clean this circuit out .
Good luck on your valve job . Do you think cam wear ,rollers, lash adjuster were failing on this cly and not operating valves properly ? Heads can't be redone with engine in compartment ?