Changed plugs and air filter now Check Engine

[bill12976]

I just changed my plugs and air filter in my 2002 Explorer Limited 4.6L. Now, the Service Engine Soon light is on. It does not feel like it's missing. Actually, running smoother than before I changed the plugs. I went back over everything twice. All is connected properly.

Any suggestions?

Thanks

 

[99ex22]

Take all the plugs out, regap them and put them back in and see if that takes care of it. If that doesnt take care of it maybe it just so happens something else decided to wrong with it at the same time as the tune up. have it hooked up to a scanner and see what the code is. alot of places do free check engine lights.

 

[Wrench]

What brand plugs did you buy and did you check the resistance of the high tension leads?

 

[BrooklynBay]

Have Autozone check the codes for you. Sometimes a loose gas cap could throw a code.