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Tim's Auto Repair
Tim's Auto Repair, Mechanic
Category: Car
Satisfied Customers: 15700
Experience:  Have owned a repair shop for 25 yrs.
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Ford Explorer Sport Trac XLT: I replaced 7 spark plugs on my

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I replaced 7 spark plugs on my ford explorer, i could not removed 1 because its was very stuck and i used WD40 to make ease to remove.After that the spark plug moved but still on place i tried to to fix it the spark plug is not tightining,i am afraid the internal thread is damaged eventhough the car is operational and running.At the end after one week appeared the on screen the message"Engine failsafe mode" its happen when the sppeed are between 40 to 60 Km/h and feel the car reduce itself the speed.
do you have the 4.6 engine?
tell me all you can
Customer: replied 3 years ago.


Year 2004

Engine 4.6

Model: Explorer Sport Trac XLT

the problem is that the plug has stripped out the threads of the head,,,,,most ford dealers will want to replace the heads because of this,,but,you can fix it yourself with a spark plug repair kit that you can buy at your local parts consist of a heli coil thread kit and a threader ..or,,you may be able to get an independent shop to do the repair for you....
you also need to replace the plug boots on the coils if they have never been replaced,,these will jump a spark to the head when they go bad

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