Hey guys, new to this forum and not sure if it's in the right place or not.

I have a 1995 Honda Civic Dx that when driving, never overheats. When I stop in traffic for more than 10 minutes, the temp gauge starts to creep slowly. This car really has me stumped as I put a lot of money and time into it already. Things I've done: head gasket, spark plug wires, spark plugs, distributor cap and rotor, replaced all belts, water pump, radiator, upper and lower hoses, oil pan gasket, fulshed the heater core, changed the thermostat, replaced the two temperature sensors (under distributor), new exhaust, brand new coolant and oil (obviously), radiator cap, and changed the heater valve. I do not have any milky residue in the reservoir or on the oil cap. I do not blow out any white smoke.

I did the parts in phases as the radiator, flushing, sensors, and oil pan were just done as the last projects. Now the check engine light is on, I jumped the wire under the glove box and it flashes the check engine light 6 times which is the water temperature sensor. I just changed that freaking thing. I changed the sensors thinking that would help my issue of the gauge fluctuating.

along with the check engine light, the engine has a tough time starting (which it NEVER had before) and it used to start right away with no hesitation. The fuel pump I hear working so I know that's ok.

I'm sorry for the long message, I'm just stumped and I'm hoping some of you car gurus can help me out. This is my daily driver for work and I kind of need it. Besides this issue