The bottom half of spark plug broke off. The piece with metal and ceramic at the very bottom.

Does not seem to lose any power. I was told that if it were plugs or injectors it would do it all the time. I was also told that my torque converter could be going out and to add friction modifier to solve the problem. Could it possibly be a my fuel filter?


Have had Navigator tranny rebuilt, have replace solenoid, have replace wiring harness to transmission and still have this shift code and the OD light still flashes. Shifts perfect when taking it easy but when you have to hit hard to speed up is when it shifts hard in the 1-2 upshift only.

I did a tune up and put it back togethor and now it wont run inless i unplug the MAF sensor. It was running before i did the tune up,so i am lost. Please help

The engine is dropped, used one arrived, what materials will I need to get it running. Ex: How many quarts of oil, what kind of oil, antifreeze, Freon, etc.. the engine that is going into the Navigator, has 114k miles on it. Thanks,

My running board on the passenger side is not going up but I can hear the motor trying, is there a way to tighten it up or what should I do.

I can't figure out what size star fitting tool I need. Ive tried everything, a 50,55,60 and then tried star alan wrenches and I cant get any to fit. Apparently this is the only year navigator that is set up this way..can anyone help?

I turn the knob on the dashboard and put it in 4 wheel low and now its stuck and won't come back out

my driver side window doesnt work but all others work fine. when i hit the button i here a click down by the fuses and i thought it was the relay 4 cuz when i pulled it out it stopped making the click but i went to napa and bought a new one and put it in same thing happened

If I replace air suspension control module as same type part number do I have to flash or reprogram it?

also side rearview mirrors won't fold in

I had to remove Relay Fuse because it was draining my battery what is the problem? Why wont my lifts work. 2002 Navigator.

The rear end of the truck drops down hard now after taking out of the shop. Can this be fixed?