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ECMlink Thanks again for some tuning help

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Thecarfixerguy

Proven Member
59
23
Dec 13, 2022
Idaho
Hey all, I finally got the car put back together and drivable after AWD swap and fresh engine build. I need some help getting it at least safe to drive around town without melting my pistons. I am in touch with the local DSMLink expert who will help me really dial things in, but it might be a while before our schedules line up. I attached a log from a drive I took. I'm hoping someone can help me make a little progress.

Concerns:
1)It pings like crazy on light accelleration.
2)Goes rich under hard accelleration and starts bogging down rich around 10-15 PSI
3)Stalls coming to a stop, it won't idle at all with AC on. Throttle body is rebuild and base idle screw adjusted. I finally got it idling OKish adjusting the idle air clamp, but it's still not great.

I have global fuel adjusted rich for my Alpha 1300 injectors, but the idle issue gets way worse if I use the recommended % for injector size. I did adjust dead times in live data to match injector spec sheet.
Car has 8.5:1 pistons and FP6851S Turbo. Regulated to 44PSI Fuel pressure. It has 2GB cam sensor. Omni 3 bar MAP, GM IAT, PLX Wideband, running speed density, but stock MAF is still installed and logging.

Thank you for any help.
 

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You're about 2 full points lean. Adjust your global OR base fuel pressure accordingly.

Your coolant temp is a bit on the high side.
Thanks for the input. Tuning is really new to me coming from a background of stock vehicle auto repair. My AFR says I’m pig rich on a pull in open loop, but coming to a stop it does go super lean and stall. It seems to me with these 1300cc injectors I should be rich with the global setting where I have it. It seems like no matter which way I go with global I either lose on idle performance or acceleration performance which I suppose is where learning to adjust the tables is what I need to do. It’s a steep learning curve though.

It was 105 degrees outside temp in stop and go traffic on this drive, with the AC off, oof. So the engine temp being a little high makes sense.
 
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