ReTuning Built D16 - Start and Idle - Need some advise >&

platinum00 · Post by **platinum00** » Sun Sep 30, 2007 5:46 pm

I need some assistance ReTuning my Built D16y8.

Car is currently tuned on an S200, making 424whp/365wtq. Had that tune for a year or so. Nothing wrong with the car, it runs fine.

Kinda bored with the setup and decided I should learn how to tune. I purchased an S300 already socketed in a P28. Im runing the included stock P28 basemap that I modifed for the GM 3 Bar and RC750cc's. Nothing else was changed on the base.

The car bairly starts and only idles for a few momemnts if I give it just a touch of gas. Using an LC-1 Wideband reading vary lean, around 24 A/F. Tried adjusting the overall fuel trim from various increments of 1-100% with no luck. Same A/F. I do get some response if I increase the fuel table in the RPM range it's trying to idle in (1000-2500), but it still wont get better then say 19.5-22 A/F.

I got to be missing something. I know the timing from the P28 Z6 is different then the Y8 but I did not think it would make this much of a difference.

help me out...

-platinum

Post by **Spunkster** » Mon Oct 01, 2007 10:17 am

Keep making changes to the fuel trim settings until you start seeing it have the right AF ratios. Make sure you have realtime update on.

platinum00 · Post by **platinum00** » Mon Oct 01, 2007 4:17 pm

thanks spunkster.

can you go over 100% on the fuel trim. From what i have seen most use 20-40% maybe. I thought I was missing something since i was already so high.

I will try again. thanks