How do you fix a no crank no start? Already changed battery, starter, and ignition module. Someone please Help??

Auto zone tested the battery. It was junk. I read on some different forums about the ignition module. Only $15 part. Then someone told me the starter, so replaced it. The problem went away for a month or two. Then recently the problem went from bad to worse. Now the factory remote start is having troubles too. At my wits end. Don't want to take to a garage when all they tell is nothing wrong because it don't happen all the time.

Nothing to do but keep guessing then , without it acting up and without being able to test anything.

A grocery list of the possibilities isn't what you need. You could guess a thousand dollars worth of parts without fixing this. Shops don't just say that there is nothing wrong, they know there has to be a problem with the car otherwise you wouldn't have brought it in. When a problem is random in nature there can be some clues that can help narrow the focus but even then it isn't a good idea to shoot from the hip, problems like this take a good game plan performed by a patient, trained specialist. One routine is labor intensive and that means connecting all of the required testing equipment and being ready to attack the problem when it occurs having pre-planned the testing routine. Another is to make themselves available to have someone drop what they are doing and come to you as long as you are close enough to them when the problem occurs so that they have a chance to start the diagnostics and begin to narrow the focus on the issue before the vehicle manages to start.