Hard to start in cold weather

Welcome to 2CarPros.

This could be a few different issues. The first thing I would check is fuel pump pressure. Less fuel is needed to start a warm engine, so that may be why it starts in the summer and not when cold. Here is a link that shows how that is done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

The next thing that can cause a hard start when cold is the coolant temperature sensor (ECT). This sensor tells the computer the temperature of the coolant. With that info, the computer determines how rich or lean to make the air/fuel mixture. If it thinks it's warmer than it actually is, the mixture will be lean and can cause a hard start or no start. The only thing that makes me question this as the problem is the idea that you have to wait.

I want you to try something. The next time you start it cold, try this:

1) Turn the key to the run position (engine off) and count to 5 and then turn it off.

2) Repeat step one, four times. On the fifth time, see if it starts quickly.

If that works, it is a fuel pressure issue.

Let me know what you find. Also, if you have access to a live data scanner, when the engine is cold, see what the ECT sensor indicates the temperature to be. It should be very close to the outside ambient temperature.

I will watch for your reply.

Joe

Welcome back:

Basically, that indicates there is excessive fuel pressure drop off. It could be the pump, but more than likely, you have a fuel injector leaking. If you look at the first picture I attached, it explains how to check for a leaning injector. I would suggest testing for that before the pump.

Let me know what you decide or if you have other questions. Also, if you ever smell raw fuel, make sure you check for leaks. That can cause the problem as well.

Joe

Welcome back:

I suspect there is an issue with the fuel pump. We need to check fuel pressure to see if it is working.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Or, try this. See if the engine starts for a couple seconds using starting fluid. If it does, then we know it is a fuel related issue. If it doesn't even try, I need you to check for spark to the plugs.

Here is a link for checking ignition spark:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Let me know what you find. Honestly, the easiest and quickest thing is try it with the starting fluid. Please let me know if you have questions or need help.

Take care and try to have a good weekend.

Joe

Hi, Robert:

I'm glad to hear that took care of it for you. Please feel free to come back anytime you need help or just a simple question.

Take care and thanks for the update.

Joe