Hi, I am brand new to posting, so hopefully this goes to the right place.
I have learned TONZ about this car and fixed many things and great ideas on upgrades from this forum. Thank You!

Anyway... I am having concerns on my live data readings right now showing my timing being -16 degrees at idle, and up to -34 degrees at 2500 RPM. The car seems to run just as great as ever though. (I assume the computer is doing this to keep it running well), but anyone know why?All the other readings seem to be within range from what I have researched. I have also had issues with PO171 and PO174, which I have found on here many things about vacuum leaks, etc. but no luck. I have no idea how long I have been at this timing as I just got the scanner. I assume it's not normal?

May Help....
I have recently installed NeedsWings magnacore wires, have E3 plugs. Also a while back a 74MM Throttle Body with MAF, and K&N's. Nothing major done, but may be related? Have recently replaced 02 Sensors, and Fuel Filter. Fuel pressure tested out right about 60 psi. Manifold vacuum running 12.7 at Idle and around 9 at 2500.

Any ideas from anyone???
Thank You in advance.