Idle and start problem when warm outside

[jbbauer7]

I'm tuning my JRSC'd Civic SI with a Hondata S200. When it's cold out the car starts and idles great. Except now that it's getting warm out I sometimes have to step on the throttle and hold the throttle at ~20% for a minute to get the car to start and keep it running. But after a minute the idle AFR is perfect.

The car runs around 10AFR when I first start the car. My idle fuel pressure is at ~40psi and I'm running a Walbro 255lp fuel pump. Also the engine dies soon after taking off the gas cap. Any suggestions??

I noticed a couple posts in Hondata's forumn from Hondata and Fox30 with some possibly related issues:
1) I have a 160 degree thermostat (colder then stock and not recommended by Hondata)
2) I've replaced the OBDII with OBDI but my throttle body remains stock (ie. no "cold idle valve" as Fox30 is suggesting)
http://www.hondata.com/forum/viewtopic.php?t=1193


Here are the values in the Injector size settings of my ROM:
Injector multiplier: 0 .413
cranking fuel adj: 0.6
throttle tip in adf: 0.6
ECT fuel adj: 1
Post start fuel adf: 1



--------------------
00 Civic SI
JRSC w/ 8.5lb upgrade
Kamikazee hdr
Comptech Dual stage intake
RC440
Hondata S200
Innovate WB O2
XBMP XBOX