How many miles are on it ? Is the "Check Engine" light on ? How much does your local Ford dealer charge for a standard tune up? The coils are not normally changed during a typical tune up unless you're getting a misfire DTC code (you would also get a Check Engine light....). Are you the original owner? I would only use Motorcraft or NGK sparkplugs in your Expedition. Avoid Champion or Autolite at any cost.
It has a little over 150,000 miles on it.
The "Service Engine Light" has come on but it seems to come on and off.
I haven't called my Ford Dealer to see what they'd charge for a standard tune-up, I guess I should.
I'm not sure if I'm getting a misfire DTC code, to be honest have no idea what that is, but as I said the "Service Engine Soon" light has been coming on.
I'm not the original owner. I bought the car used but I am the second owner and the Carfax on it looked good.
Thanks for the information on the spark plug brands. I will definitely go with one of those two if they are needed.
I think the reason the mechanic said that the coils may need to be changed as part of a tune-up is because of what he felt when he drove it after installing the new alternator. He also said he wasn't certain that he'd when I have a chance to bring it up to him and he'd do some diagnostics to try and figure out what the problem is.
The mechanic, btw, seemed to be very honest and fair with me. He did some extra labor for me free of charge and only charged me $55 for the installation of the alternator which I don't think is terrible. I also read some very good reviews before taking my car to him and he is extremely convenient since he is literally a .25 mile down the road.
Now granted, the engine coils were dreadfully overpriced compared to what I've seen online but I mean I think most mechanics mark-up their parts cost. I may be wrong though.
As far as what I should have done, should I take it up to him and let him do some diagnostics to see what the problem is? Also, if it is the engine coils that are the problem what brand should I go with or does it not really matter all that much?
Thanks again I really appreciate all of the help.