I have a 2009 Nissan Sentra 2.0L. Recently when starting immediately after starting it surges between 500-1800 rpm and if I don't burp the gas pedal it will die. Once it's warmed up though I have no issue, it starts smooth and idles normally, drives normally. I cleaned the MAF but no difference, new air filter. There is a slight discoloration on the shiny part of the MAF, not sure if that mattered.

I have a new MAF on the way (possibly the intake air sensor since it's combined with the MAF) Any other sensors I should check out?
Possibly the Coolant temp sensor?

I see the electronic throttle actuator is built into the TB which is a pain since the whole unit would have to be replaced.