a few issues lean starts and more lean spots

[barry]

okay heres my issue ...i made a basemap so i can tune my car got everything close got tired and said screw it added some more fuel got everything closer and stopped for the day.....came back to the car to drive to work and my partial throttle is leaning out and now when i start the car it gets lean.......im talkin 20:1 afr its making me mad! am i forgetting something! do i have to tune my ECT and IAT and VE corrections i noticed at night or when its cooler out my afr are all over the place worse when cold if so what do i do with these tables and correctios!

[9400RPMS]

IF you setup your basemap correctly , you shouldn't have to fool with any of that.. battery offset comes to mind.

[JaredKaragen]

Yeah, my first guess would be battery offsets messing with; or just your first 4 colum values at the cruise rpm's... If your engine is already fully heated, and you didn't just start driving from a stopped heatsoak condition, I am pretty sure it's just fuel table issues. I have found sometimes that one column will want to be alot leaner than another; and this in some drivig ranges will cause a lean spot when reading from the lower of the 2 columns. What's your fuel system specs? Pump? Injectors? Fpr?

[barry]

injectors- dsm450cc pump walbro 255 stock fuel pressure regulator! i tried to make the map as close as i can and i made mdifications to those ect and iat tables that was the 1st thing that i did before i even touched the tables! most of the points hit my target af or is really close unless i come to a stop or idle for a period of time! some of those points that i hit will change from 14.7 to 16 or even 17 at crusing

[dbsharp]

One time my car would lean out when there was an above average electrical load, if the fans switched on, or the headlights came on, etc... I tried all kinds of thing to solve the problem and it turned out to be an issue with the ECU. After I switched out the ecu I never had the problem again.

[barry]

yeah it was weird like today i drove home parked it for about an hour ...cam back outside and my wideband readings were all over the place .........richest of rich and leanest of lean ......and once i got that problem taken care of it runs smooth except for that mad fuel cuts and lean spots between shifts.....idk i parked the car again .....no point in driving it