Question about 1999 Lincoln Navigator

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Navigator shuts off while driving

Hi, I have a 1999 Lincoln Navigator V8that randomly shuts off while I am driving. It shuts off and the steering wheel locks, After about 10 minutes, I can restart the truck with no problem. I have taken it to 3 mechanics who can't find anything wrong with the vehicle to cause this problem. The check engine light is on and it is coming up with PO174-mass airflow sensor. So I just had that replaced and the light is still coming on, and the truck is still shutting off while driving. I had also taken it to the dealership, but they wanted to fix EVERYTHING under the hood...things that were not even in need of repair...which was also stated by these 3 separate mechanics. I need some advice please!

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  • Jeff Hammack
    Jeff Hammack May 11, 2010

    The newer model trucks and cars reguardless of manufacturer, have electronic ignition, these systems are usually controlled by an ignition module, when the engine runs it presents no problem and often when it fails it sets no code, but from the first generations of these modules in Ford, the engine will dies and start right back up. there are two coil pack modules on your truck, they are not real cheap, used ones from a salvage yard will work. I would try this to see if that is what is causing the problem. Clear the code P0174 after replacing these modules and see if it comes back, it may be setting as a result of the engine dying. Then we can talk about all the things under the hood that need repair. Let me know whats up.


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