Air intake and Gibson headers???

[jonstreet]

Lm7 motor did egr block off now getting 12mpg do these engines need to be tuned like ecu pcm. And can I just tune it with like a superchips obdII program rather than paying someone a button load to still it on their laptop I now have 12 codes from egr to lean on both o2 sensors. Help? Lol

 

[df2x4]

Yes, you need a tune if you delete the EGR. Otherwise you'll be much more prone to detonation and wear on your engine.

No, you can't do it with a handheld programmer. You need a real tune. I recommend Black Bear Performance.