As of late I've been noticing my rpm's are sitting at almost 0 sometimes during idle in park or in drive at a stop lights. The Jeep does not feel like it's going to die on me at all idles really strong, no sputters or struggling and only happens after it's warmed up and been driven a few miles. Otherwise, she idles at 500-750rpm after not being driven for a few hours and sounds exactly the same as when she idles at "near zero rpm" according to the rpm gauge. While driving and accelerating, my rpms look fine when shifting with my AW4. When it idles near 0 i will kill the engine and the rpm gauge won't even drop it's that low when shut off, restart and have the same "low idle" problem.

I cleaned my IAC about 2000 miles ago when I installed my bored TB.

Other than that i'm not sure if i have a lazy needle or a bad sending unit? What are your thoughts?

 

Now she idled fine this morning.