What did I break?

[K44]

I changed back to the stock 2017 5.0 intake manifold, along with the stock air box, MAF housing and air tube. I loaded the stock tune.

My MAF period is jacked. My LTFT's are in the 30% range.

Is this a vacuum leak or ????

I'm going on a long trip and thought it would be best if I had the car stock in case of any problems along the way.

I'm supposed to leave Wednesday morning. Any help is appreciated.

Thank you.

I'm seriously thinking about putting the non-stock manifold back on. My trims were 1% before I went back to stock.

[Slowleen]

car is adding fuel so id start by looking for a vacuum leak. as long as you put all stock parts back shouldn't be any issues.

[K44]

I must have cracked the manifold. I could not find a leak. I capped off all vacuum ports, still had a leak.
I removed and reinstalled it with the same result.

Replaced it with my other manifold and all is right with the world.

Head scratcher, I can find nothing wrong with the manifold. Car ran fine except for the fuel trims.

[Slowleen]

Hmm sometimes the injector orings don?t seat properly and leak, or could be cracked.

[tortuga281ci]

you could try spraying starter fluid around and see if the engine revs up anywhere