Need help running lean

[TheFox]

i was running my car today as i open the throttle up past 50 my check engine light comes on when i let it coast back below that 50 mph mark it goes off pulled my codes says it is running lean, cleaned my IAB and and hooked up my line lock.

 

[jrichker]

What speciific codes are you getting?

 

[tim281]

I have a similiar issue... At wot my check engine light illuminates but as soon as I let off it goes out. I am probably going to replace the pump and regulator since I already replaced fuel filter, o2 sensors and had injectors cleaned. My problem showed up after my intake swap. Codes 91 & 41 showing lean.... Plus that pesky evap/eye plunger code but the eye is fine.