Fuel trims after PCV and valve cover replacement

[Jimmy Brooks]

Hey all. I recently did my valve cover gaskets, the job was a PINTA, not because of the injectors but because of bold clearance at the back of the engine. Regardless I ended up pinching one of the gaskets and had to redo the drivers side but now it is all sealed and good. I also replaced the Pcv diaphragms since they were making a loud hissing noise and because one of them was not seated correctly.

Since doing this the hissing noise has minimized but the truck now makes a short high pitched noises from both of the diaphragms after turning off the car and my fuel trims sit around -9 to -10.2% anyone have any ideas?

 

[Jimmy Brooks]

update: sprayed the MAFs with MAF cleaner and swapped sides to see if the readings would stay the same. Amazingly the fuel trims cleaned themselves up, combined running in between +-5% on both banks. Not sure if they were really that dirty (they looked clean) or if the fuel system was still figuring out that it was a fuel system, but I also don’t care. Car run good, man happy.