Originally posted by dougie2
Why is your EGO correction adding fuel at idle? Maybe you simply have VE values that are too low. Matt- maybe you could send me a copy of your MSQ file and I can compare it to a lot of MSQs that I have, that I KNOW work great. Maybe I can find something there.

Well let me explain in more detail i guess. If i start it up from a cold soak, it warms up fine, and once it reaches my set temp of 160 degrees, i have ego running closed loop at idle. The stock ECU runs closed loop idle at stoich, so i should be able to do the same with the MS.. Well the problem is if i do a hot restart, it runs really lean, with lean misfires, and it runs pretty bad..(maybe 16-18.0:1 A/f) if i didnt have ego correction at idle, it would always run lean...it runs fine after the ego kicks in to richen up the mixture. This is why i kinda have to run ego closed loop at idle.

Its just strange that a cold start to fully warm, it runs great, adn my closed loop idle correction is maybe damn near perfect, at +/- 5% on the ego gauge. Even today at a car meet, i let the car sit for maybe an hour or so, so it had to go into warmup enrich, coolant gauge was just a little bit above the full cold mark. Well the same thing happened, it ran lean on the re start, and even LEAN during the warmup period, UNTIL ego correction kicked on to richen it up to normal A/F's. When this happens, the ego correction isnt at +/- 5% anymore like it is on a cold soak start, its more around 108-114%! Its almost like the baro correction is kicking in for some reason, and the entire map is much leaner(baro correction is turned OFF) All my A/F's, fully hot from a cold soak start, are PERFECT! lol i have no clue whats going on..Its done this with every code version i've tried. I'm currently using the 024s13c firmware, and it seems really good so far besides this one issue. I just dont get it.. I've searched a lot on msefi boards, and seems like many are having this issue as well..

Doug, i'll get an msq to you to see if you see anything odd...