When I crank up my truck the rpms go to about 1200 and come down very slow to my desired idle. It also does this when I rev it, comes down to about 1200 and goes down very slow until reaching my desired idle of 675. I would like it to be a "quick" rev and back to idle.

 

do you have a 2002 PCM? My stock 2000PCM didnt do that, but now i have a 02 it does that.. it dont bother me at all..

 

DId you work on the VE table? What about you ridle tables, how much did you raise them if any?

 

nonnie-Yes, it just started since I swapped to the 02 pcm.
Flyer-I had someone here help me with my tune so I'm not exactly sure what they've done. I know it helped a lot, but there are some things that still need to be adjusted.

 

your idle rpm table is ect based
as well as some of the idle airflow tables

Is it just when the engine is warming up?

 

there are a few tables for that but if yuou have EFI live I can not help you that much

 

Play with table B3407, your desired airflow table. Comparing your tune that you sent me to a stock LQ9, your desired airflow is about 15% higher from 80*C (176*F) and up. Try replacing the bottom 6 rows of 7.8 & 7.5 with 6.5 & 6.3.

 

I don't know how crazy your cam is but try 6.5 & 6.3 like Justin said, if it has trouble idling just raise both up a little.

 

Ok. But wouldn't that cure it just when the engine is warm?

 

Well that table deals with all engine temperature conditions. There are other conditions that can cause this issue as well.

To be honest, I would get your VE nailed down, then your MAF nailed down first, especially with your MAF de-screened. Get that wideband hooked up properly and go with it. Your idle issue might not be as pronounced at that point.