ITP

Hi,
The car is an 05 running 96940011. It has a built 2.0,HKS 272's,Rc1000cc,open filter with 3in turbo inlet pipe going to a 35R.

I have a issue with no LTFT in the "low load" datalog. Even at idle, the "mid load" will change. Car idles at about 50hz at 900rpm with about -13inches of vaccuum. I am assuming that this is enough airflow to put it out of range just enough to not be in the "low load" state. If this is the case. I'm fine with that. Although I'd really like to be able to use all 3 LTFT ranges.

Does anyone know what airflow ranges determine which trim range the ecu uses? And if they are able to be changed? I have seen no maps for changing these ranges.

I think this car would be ALOT easier to tune on SD.

Thanks

ITP

Figured out the problem thanks to a thread posted by Applaudd about a HKS intake. Looks like I will have to redesign the turbo inlet pipe. Maf was hooked up to a 3" pipe with a 3"-4" reduce at the 35r. So I jimmyed a 2.5" pipe and the Hz's dropped back down to about 34hz and the afr's were more stable as well. Not to mention it fixed an off idle tip in issue. So apparently the maf's are sensitive to pressure drop. Time for some fab work.

ITP

I stand corrected on my own post. It was a 3.5" pipe going from the maf to a 3.5-4 reducer at the turbo.

Appauldd

iTrader: (22)

WOO HOO....I am glad I was able to help.

Yeah the MAF does not like the pressure drop created by larger hard intake pipes. The Hz needs to be stable to affect idle.

Paul