PO300

Egr circuit needs to be cleaned

 

You get the intake manifold too?

Glad it worked out so far.

 

Engine coolant level is stable?

 

Sounds like the head gasket is compromised if the coolant is not on the ground .

You could pull the spark plugs and endoscope them. I bet you’ll find one of them looks wet.

Good luck and keep us posted .

 

What do the Techstream headers -3,-2,-1,0,1 mean? Some sort of chronology, I guess?

I love the endoscope idea.

Has there ever even been a documented case where fuel injectors -have- been the issue?

 

Fuel injector being the reason why coolant loss?

 

That's a good run for this engine.

Check out Danlatu's thread. He reused the engine with close to 300k miles

 

Fuel injector being the reason for misfires/engine trouble. It seems like they're often replaced/messed with as a last resort in a chain of simpler, less expensive repairs for engine trouble, when you ought to just be checking the cylinders for coolant.

 

I’d swap coils before injectors .

Since they are on top of the spark plug, the heavy lifting is done for access .

That’s what usually is swapped around and the injectors are usually left in place .

 

I was trying to decipher what the -3, -2, -1, 0, on tech stream as shown on your scan?

 

I suggest doing more diag instead of unleashing the parts cannon.

 

I don't know for sure, but I was wondering if that was the freeze frame data and time before (-3, -2, -1 second), during (0 sec), and after (1 sec) the code is triggered. I could be completely off though.

 

Not necessarily.