To give you a little background I got 3 sparkplugs and coils changed in January by the Ford dealership by my house when I had a miss. Now I am at school and and had a miss on the second cylinder, not one that was replaced, and the service guy at the ford dealership told me that it was a bad coil, BUT that I needed a full tuneup and would need all of my coil boots replaced (he said they were dry rotted) and everything else there is to be done with a full tune up. It will cost me 250 to do the coil change and 1000 to do the full tune up. Am I just being had, or is this a decent idea? Thanks a lot.

 

In some cases once one coil starts to fail, the rest follow within a short time. In that case, its best to just replace all of them as preventive maintenance. $100 will get you a full set of coils from uneek or global automotive on ebay. Lots of people use them around here. Id say save your money and do them yourself.

 

Ive had people tell me also that when one goes out they will all start going out.. I had one go out on me about 30,000 miles ago and replaced the one and so far havent had anymore problems. 116k on the other 7 cops