I have a 2000 Accord, 3.0. The engine does not start on cold mornings. Like 50-60 degrees. New fuel pump.

When turning the engine over, there is mild sputtering like the engine is getting a sniff of gas. Using a couple of shots of starter fluid get the engine going but it is necessary to hold the engine at medium rpms to warm the engine up. Once warmed up, it runs beautifully.

 

So when the car starts cold it is reading two temp sensors I believe: The coolant temp and the air temp. Have you scanned the car to see what they are reading. It sounds like maybe the coolant and/or temp is reading warm already, thereby not providing signal to run richer at startup.

I also think that the coolant temp is read through the ECU and not directly, so it could possibly point towards the ECU at some point, but the sensors would be the first thing I would think is wrong.

 

What scan tool is used? OBD2?
Thanks. I'll check into the coolant temp sensor first. It seems the most logical.

 

I simply use an OBD-II bluetooth so it works with my phone and I can load different apps.

The one I use is Carvista:

But as long as you pick any ELM compatible device it should work fine.

For example, here is another:

Then pick your app, some come with them, some are free. I use obdfusion , car scanner, InCardoc for example, but there are many others like Torque that people like.

I agree I suspect coolant first and then the air second. But a quick scan should show you what the computer is seeing. Then you can check to see if they are damaged in some way.