L76 NW102 Idle

[dave05gtpcg]

Good evening HPTuners community. I am extremely new to tuning and am at my wits end trying to get my engine to start and idle properly. I have been reading, searching, watching videos everything i can possibly think of to get this thing to start and idle right. When its started hot or cold it flares up to nearly 1800rpm then slowly decays to ~850. If you blip the throttle the idle comes up and hangs at 11-1200rpm for ~5-8 seconds. When shifted to reverse the idle dips to 400rpm it corrects overshoots dips again then stalls, not all the time though.

The engine is an L76 Stage 2 TSP, GMPP heads, LT no cats, 3200 Stall Circle D, Fast LSX102, NW102, RotoFab big mouth and card style MAF, ID850, Squash return fuel system.

I've attached the tune and a log i captured the other day. first log after second tune, idle hanging, stalling in reverse still,.hplG8 StartUp Flare Hanging Idle.hpt

Thanks in advance.

[5FDP]

Doesn't look like you changed the ETC Area Scalar for the 102mm throttle body. I think it's around 7800-7900 for that size throttle body.

You also forgot to half the IVT terms for the double stoich AFR method on the big injectors. You'll want to revisit the MAF/VVE tuning to make sure it's not changed a whole lot.

[dave05gtpcg]

Thanks 5FDP! I'll give it a shot tomorrow and see how that works out.

I forgot to mention it also runs E85

[Maxspeed96ct]

did it help? im using a etc scaler of 7400 and it works ok but cant get park or neutral right. Some posts are saying to try 7000 as a scaller so its easier to control

[dave05gtpcg]

I haven't had time to mess with it yet. I'll try this weekend hopefully and let y'all know.

[Lakegoat]

Mine is set at 7300.0000 . If you change that to 7500 or 7800 or whatever, you have to go back and re do your maf and ve tables. Then it will run right.