Same thing I was thinking also... O2's

 

Highly doubt it is the 02's they are new along with the harness'. The whole engine has less than 50 miles on it and everything is brand new on the engine besides the alternator, ignition coil, pcm, and the ignition coil module. I have replaced everything else functional that needed replacing or should be replaced during a new engine rebuild.

The only other thing I can think of is that the injectors are not 32lb injectors, but perhaps smaller?

Here is the old post on the injectors that I purchased.


The injectors have part number as follows.
280150756

I looked them up via this site...

www.gnttype.org/techarea/fuelsystem/injflow.html

They are red tops with chrome bottoms.

However, this is a post a while back of people trying to help verify what
size injectors they are.

http://web.camaross.com/forums/showthread.php?t=352333

 

Here is the GM part number for these injectors as well...

Fuel Injectors: "32.5 lb/hr at 45psi" GM #15637677
Bosch: # 0 280 150 756
Kinsler: #10150