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P0299 gets set when the turbo underboosts at 4psi. the question is why the turbo is under boosting which both a long and distinquished list of tests. the other codes can be helpful but get some flights (telemtry) on systems to see if 2 & 4 are over fueling for example.
 

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Can I ask you to dumb this down a little for me. What exactly am I supposed to be looking at? I don’t follow “2 & 4 are over dueling” maybe you meant cylinders 2 and 4 are over fueling? But even if that is correct, how do I look at that? Please, if possible, simplify the process as if you’re explaining it to someone who knows almost nothing about it. I’m trying to figure out which data I need to be looking at for answers.

As a secondary note, I threw a new MAP sensor at it. Set off the code the next morning getting on the highway. So no go there.
yeah I said 2 and 4 for brevity on my phone, but a tech can run a flight and plot the fueling for each cyclinder and they should all be similar, typically 2 &4 for whatever reason Ive read seem to get more carbon and they foul up the rings which can cause reduced compression and therefore over fueling.

0299 is barely better than idiot light to be honest. the laymans translation is that “the pressure on the turbo side of intake is under 4psi, good luck!”. lol

my swirl valves are working perfectly at 80k and the tech was shocked. if you have low soot, now intake leaks, a good alternator and battery its probably the turbo or a sensor
 

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the air intake is a flimsy pos and the comnection behind the engine cover looked loose on mine orob from when they did the egr cooler. when its really hot the hoses get pliable and thinks will be more probe to leak hot then cold. the intercooler hose clamps for the turbo and intercooler connections are laughable, the clamps dont ecen clamp at all, they are just suppose to keep the hose against a pipe boss fitting and notoriously leak. its the shittiest clamp design ever invented. zip ties would work better.
 
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