Hard to crank after warmed up - tuning question?

[elpiar]

My car (look to my sig for set-up) has trouble starting when it already reached operating temperature, but very easy to start when it's cold.

I replaced everything ignition related and upgraded to blaster coil. still nothing. My fueling is all perfect. Compression is perfect (new rebuild).

The only suspicion I have now is fueling compensation that is in the ECU tuning. Can you guys with 555cc or maybe other injector upgrade copy paste your fuel table for cranking?

In tunerpro I believe there are four of them, right? - Engine cranking Pulse width, - Engine cranking Additional enrichment, - Engine cranking Pulse offset- Engine cranking Ign timing

Can you help me understand these parameter and/or share your tune on these?

[WDRacing]

Well I can't help with codes or settings, but I can tell you that when it's cold the ecu starts the car with AFR's closer to 10:1 until it warms up. Many manufacturers even use cold start valves, which are just fuel nozzles that come on during start to assist in richening the mix.

Can you play with a wideband and the start up parameters when it's warm?

[elpiar]

Yea I do realize that. Here is my engine cranking pulsewidth values:



My wideband need to warm up for a minute, so it's kinda hard to know the AFR immediately after cold start up.

The values above are simply scaled from the stock ECU tune with the injector volume.

[WDRacing]

What wideband?

[elpiar]

What wideband?

PLX M-250 wideband w/ gauge

[WDRacing]

Huh...well I wish I could be of more assistance. But I'm not familiar with that software. Maybe S13FX will be able to jump in here, I know he's done some rom tuning.