Misfire when cold

[heilmansamuelmax]

I recently installed bigger 440cc injectors and I updated the size in smanager along with dead times but for some reason my car will misfire when cold especially when it hits 3k rpm it won’t go above because it starts to misfire so much but once the car warms up it runs perfect. What could the issue be?

[Spunkster]

What is the AF ratio when this is happening?

[heilmansamuelmax]

So I don’t have the wideband installed yet so from the stock narrowband it reads 10.1 afr pretty consistently and it did the same before injectors. I don’t know how accurate that reading is though because even though that’s super rich if I reduce the fuel it starts to act like it’s starving so I pretty much just left it at the base map until I get the wideband interface installed. But it was the same with the stock injectors.

[Spunkster]

You need a wideband to see what it is doing and make necessary adjustments.