why wont my navigator start?

I've heard it could be the anti theft system, the timing chain or the fuel pump.

How many miles on the Navigator?

I have the same trouble , I put a new fuel pump and check for spark , and it has fuel when I put it on cause it comes out the fuel pressure regulator with no problem when I took it off . I think it's the Anti Theft system because the theft light keep flashing and won't go off until after a couple of minutes

So what did y'all do bout the anti theft system Please email me some answers. Shakimahw@gmail.com

I’m having the exact same problem. Was there an answer as to solving the anti theft problem? nickpridemore@me.com

I have the exact problem did you ever get an answer?

I’m having the same issue the anti theft light keeps blinking if you have any answers I would like to know as well please sheena23james@gmail.com

Having same issues. I've tried reinitializing the anti theft system. I'm getting fuel just no fire. Please help.

My navergater turns over one time then want turn over no more wat can be the problem

ust stick your key in the driver side door and lock it then unlock it once you did this them try starting your truck it usually shuts off the anti theft. Note that you don't need to get out of the truck to do this just roll down your window! Also if you have a keyless entry while sitting in your truck just hold the keyless remote press lock then unlock and this should also disable the anti theft system.

Put on a new starter and have same problem it just makes a click and the battery is not dead what's the problem???!

no fire low fuel pressure

no fire at all

My Lincoln does the same thing just clicks like the battery is dead but no start

Did anyone find the answer cause I am having the same problem

Y'all. I have a 2003 Nav which stopped cranking last year and stayed at my mechanics for 8 months. Same problem. He could not figure out how to repair it. I know this is going to sound crazy but open your fuse panel and at the very top you'll see 3 relays. ( They are the medium rectangular ones about an inch X 1/2 inch) Take out the one on the left and the one on the right and switch them. Or you can buy new ones for like 13 bucks apiece. I found this last year on Google, went to my mechanics shop, did it and it cranked right up. Good luck and I hope this gets your truck going again.

Which fuse box under the hood or under the steering wheel