Testing a cranks but does not start condition on your Ford 4.6L, 5.4L car, pick up, van or SUV can leave you scratching your head and wondering where to start and/or what to test.
Well, I can tell you that testing a no start doesn't have to turn into a nightmare and that you can save money by testing certain components before replacing them.
So, in this article I'll present you with some basic working theory that you need to know to get to the bottom of why your vehicle does not start and where to find some of the testing articles.
Here are the contents of this article at a quick glance:
You can find this tutorial in Spanish here: Cómo Probar un Arranca Pero No Prende (4.6L, 5.4L Ford V8) (at: autotecnico-online.com).
A a cranks but does not start condition means that your vehicle's starter motor is cranking the engine but the engine is not starting.
A no start condition is usually due to a problem provoking a lack of fuel or spark to the engine and this tutorial concentrates on troubleshooting this type of problem.
A no crank condition means that the engine is not cranking when you turn the key to crank the engine.
If your Ford vehicle is experiencing a no crank condition, you probably should start by checking the starter motor. The following tutorials may be of help:
Alright, let's get started with the next subheading...
The most important thing that you need to keep in mind, when you're faced with your Ford vehicle cranking but not starting is that the engine needs air, fuel and spark to start.
If any one of these is missing from the mix, your 4.6l, 5.4L Ford pick up (car, van, or SUV) will not start. It really is as simple as that (theoretically speaking that is... and who speaks theoretical now-a-days?). OK, so when it's time to test specific components, we need to look at these three area:
Engine Mechanical System
OK, the list of possible things that can go wrong looks pretty long... but rarely do you see various failures in separate systems at the same time.
The cool thing is, is that there is a diagnostic strategy that you can use to figure out exactly what's wrong with your particular no start problem. Let's find out more about it in the next subheading...
“For instance, on the planet Earth, man had always assumed that he was more
intelligent than dolphins because he had achieved so much —the wheel,
New York, wars and so on —whilst all the dolphins had ever done was
muck about in the water having a good time. But conversely,
the dolphins had always believed that they were far more
intelligent than man —for precisely the same reasons!”
The Hitchhiker's Guide to the Galaxy