u/Electronic-Resolve91

I have a 2009 Ranger with the 4.0, manual transmission.

I’ve done plugs, wires and a used coil pack, tested the fuel pressure, I’ve sprayed brake cleaner around the intake but no change.

Once she gets warm she surges like this. Can someone point me in the right direction. Holding it at a higher rpm she seems to run normally.

And now I can’t pull codes, no communication with anything.

I’ve cleaned the grounds.

Help

Edit: it only does it when she starts getting warm.

IAC was replaced by my other ranger which was fine.