Running rough 0171 code

[COADY]

I’m showing a 0171 code and I put in a new mass sensor and o2 sensor and knock sensor. The tps is set to proper setting. Still running rough

 

[LARRY70GS]

Lean code. Look for a vacuum leak. The stock engine fully warm should make 20" of vacuum in Park.

 

[COADY]

It was seeping air from the back side of the PCV cover. A piece of the gasket was missing and there was a little pile of what looked like black pepper on the intake. The rattle wasn't consistent so I just replaced it and put a small bead of red high temp silicone on the mating parts. snugged them up , came back 45 minutes later and gave them a quarter turn each and should be good to go. Taking it out for a spin today and see how she runs. I don;t have any codes. Thanks Larry. Your the best!