Idle Tuning - Whipple 2.9/ LQ9 Combo

[LastCall]

I am struggling a little bit to get the idle dialed in. Main issue is that in gear, while cold or warm, the engine hunts up and down and eventually dies.

It is an LQ9 with GMPP ported LS3 heads and BTR Cam (Specs - 231/248 .617"/.595" 120+5). I have ID850 injectors. I followed SpeedDemons idle thread and made the changes according to his tutorial. I also did the RAFIG process from a cold start this afternoon, and the log is below. In addition, there are two other logs where the engine died a few times. Also attached is the current tune.

Any help would be greatly appreciated!

[joecar]

Looks like not enough air (IAC steps is over 100) and possibly a little too much timing advance... I'm still looking at it.

[LastCall]

Looks like not enough air (IAC steps is over 100) and possibly a little too much timing advance... I'm still looking at it.

Thank you joecar! Any help would be greatly appreciated.

[LastCall]

Did you get a chance to look at it Joecar?

[statesman]

Did you try adding a bit of idle air?

[joecar]

I have been out most of the weekend, sorry, I'll catch up on Monday.

+1 what statesman said.

[LastCall]

I never posted back, but adding in a little air went a LONG way! Idles better than ever.

Thank you joecar and statesman!!

[statesman]

Enjoy. :cheers: