Leaking Fuel Injector?

[GOFAST]

I have a '95 with about 9000 miles. It starts and runs perfectly except when I don't start the engine for a few days. After sitting for several days, the engine starts but idles rough for about a minute and then idles/runs normally. When driven daily, I experience no issues.

I believe that I have leaking fuel injectors which when not started leak fuel into the cylinders thus causing rough idle at start-up. I did recently replace the spark plugs and observed a gas odor in three cylinders.

What are your thoughts?

Thanks.