I've exhausted all my ideas as to why my L28 is getting such shitty mileage. The only thing I haven't done is have the injectors flow checked to see if they're dumping too much fuel.
It's basically a stock motor, with a Pallnet fuel rail, stock injectors, an Aeromotive A1000 fpr, idling fuel pressure is set to 28 and gets to about 33-34 under throttle.
Besides basic mods like EGR delete, shaved N42 intake manifold, straight pipe exhaust, ect, the motor is all stock.
As to how bad of mileage it's getting, it took $15 bucks to make 36 mile round trip last night, which comes out to about 7mpg.
Any ideas? The car seems to run fine, it's not bogging from being rich or anything.