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I will give this a shot tomorrow and report back. Thanks!

fuel pressure gauge has already been on it, never drops below 60, put a new filter on it, checked for line restrictions. No issues found

Hey guys I have an interesting tuning issue im hoping you can shed some light on.

I have a 408 with a big cam, PRC heads, fast 102, fast cable throttle body, LS7 MAF, fic 42lb ls2 injectors....

Not what i wanted to hear haha. This thing pulled what i felt was a respectable 500 some horse on the dyno

I tried adding a little more base air flow with no change. Brought down idle spark, and feel like it got worse. When it idles , it idles pretty decent.

Hey guys, I have been trying to tune a 408 and the runability just plain sucks.

It is a 408, fast 102, : 242/250 .648"/.648" (with 1.8:1 Rocker
Ratio), 114 LSA
PRC heads
T56

Anyhow, this...

While checking parameters on my 07 Tahoe I noticed it does not read commanded AFR. What am I missing? I tried searching the forums to no avail. Thanks!

this is on 87, next tank I will go 91 and see what difference I get

Hey guys, I am still wrapping my head around this so don't flame me too bad. I am just doing some learning on my 07 Tahoe 5.3 and I have a question about KR. Its the same with the stock tune but I...