Cold start issuss

There's a few of those. Wouldn't happen to have the exact number would you? 218/224 .553/.553 110+0 is the V2, for example.

yes that is the exact one, i appreciate you helping with this thanks

Alright then here you go. Deka 80 info, and I sanitized the VE a little.

Use this then post a log, please. Include cylinder airmass, dynamic airflow, injector pulsewidth per bank, and STIT.

okay i will write and log this tomorrow i really appreciate it, tomorrow after work ill post it

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Attachment 141744

It started really rough, had to adjust throttle some for the IAC so first log 3 is the original cold start, log 4 is the after IAC throttle plate adjustment

i had to give it throttle to stay running on the cold start it kept dying

Its very rich. It doesn't make sense worrying about IAC counts right now. Get the fueling a bit closer, else you'll bake in extra air you don't need.

So I?m fully new to the tuning at all, what would get me to be able adjust that mixture down? I see that they are -30% fuel trims so it?s really rich, and then the o2 is 900mv

Adjusting the VE table based on the fuel trims. Tune is setup to use STFT's right now. LTFT is disabled, but there are residual values left. Please use VCM Scanner>Vehicle Controls & Special Functions to clear them. Load this tune and log.

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Attachment 141781

still had to throttle it to get it started and when in open loop if throttle will die, log 5 is the cold start one, log 6 is after warmed up.

It's still pretty far off. Add STIT to the logs, too.

How to add STIT

I looked for that the other day when you said but I couldn?t find it

Specific Parameters>Engine>Idle>Idle Adapt (STIT).

its definitely getting better no throttle req for startup, it did die the first startup but it fired the second time and caught itself,


Attachment 141800

take a look at this, im unsure if im doing it right, but my fuel trims seem closer but im unsure if this is correct still, this is the tune i adjusted the VE table some

Attachment 141803


Attachment 141804

Hey that's pretty good. Keep doing it and you'll get there.

For the dying at startup copy-with-axis your VE table to the Cranking VE table. It'll only do 3 columns, 400, 800, 1200rpm, but a linear interpolation between them will suffice. 1200rpm and up will be the same. Use horizontal smooth 3x between 280-400rpm.

okay thanks i appreciate it, so the goal is to get these fuel trims as close to 0 as possible correct? or do you just aim for +-10?

Within 5% if you can for VE.

is there something to adjust per temperature? it seems like it doesnt run right until it hits 180 degrees