Tune Up or Not to Tune Up???

[EXPYGUY+4GIRLS]

I'm new here and enjoy reading all the info.

I recently purchased my 1999 EB 4X4 5.4 about a month ago. It has 217,000 miles on the motor and the tranny was rebuilt about 3 years ago. It runs great with no problems, but I do not know when the last time the spark plugs were changed out. It passed smog with no problems but as I said I don't know when it was done last. At the same time I am scared to death about the potential for the threads coming out with the plug and/or plug blow out.

What do you guys think?

 

[CARO'S98EB]

change the plugs cold should not be a problem just make sure they are tight especially #4. I would replace the coil boots at the same time or the coils themselves if you find them cheap[keepthe old for spares].

 

[JUST4FUN]

the old saying "if it aint broke"

 

[Scottandtyson210]

^^^^^ I agree...If it isnt causing any issues dont change anything!!!

 

[Canadian Expy]

You can replace plugs with new ford plugs , just make sure to torque them down to the right amount

 

[EXPYGUY+4GIRLS]

Thanks for the advice. I will just leave it alone for now. Runs great.