I’ll try to keep this shorter than the previous.

I have a 2002 Honda Accord LX 2.3L 4 cyl (f23a1)

Cylinder 4 is misfiring ONLY at idle with low rpm

- Sparkplug replaced
- Tested Distributer, wires and plugs, all working.
- Leak down test showed no leaks in valves, rings or gasket
- Cold motor will sputter or stall if revved over 1000RPM and held for 15 seconds
- idle is very rough, holds at 690-750RPM
- Cylinder 4 compression is 90PSI, other 3 are above 170
- I put engine restore in the motor
- Replaced MAF sensor
- Replaced fuel injector

This all happened a little after I put throttle body cleaner in the throttle body while attached to the car. Not sure if it’s related or not.

Car continues to miss at low rpm and idle but runs smooth and drives smooth with no misfires when moving.

Any help and ideas would be greatly appreciated.