not sure why...it's what i read from people that are a lot smarter than me and it worked for me haha. stock IAC steps are anround 40 IIRC.

 

prolly cause it gives it the widest range of adjustment.. get it too high or to low and it cant handle a surge? just my first thought.

On my buddys 5.3 truck we have tried everything, even swapped my TB and sensors over to it and played with the tune. nothing works for a baby cammed 5.3 trying to get it to idle. so im thinking of drilling out the blade. i have a spare from my samurai if screw it up.

 

Strange. Mine idles perfectly fine, even with bone stock tune (with the idle raised up a bit) and the stock TB. I have noticed that throttle cracker can sometimes cause a surging idle, but only when moving. Adjusting the idle spark correction also helped a bit.

 

I just looked today and mine was idling at 92-95 steps when hot.

 

I just find it weird that Justin couldn't get it to idle right if y'all saying its in the tune...

Gunna try a new IAC, maybe it is bad?? Any way to test it? What brand would y'all recommend? They are over a hundred new from speakership, and eBay has a few cheap ones.