Originally Posted by BobbyG1129

Well I read a lot on here as I am not a mechanic but am mechanically inclined as I've been doing construction work for 15 years now. Anyway my 03 Navigator 5.4L with 134,000 miles on it was hesitating on acceleration, shaking on idle, running like crap basically. Took it to advanced had codes read and said misfire on #2 and running lean in bank 2. So looked up on here and you tube and figured out that it's probably ignition coil (COP). Changed it out this morning wasnt too bad just had to remove computer and bracket and push some hoses out the way to get cover off disconnected wire and pulled old one out and put the new one in and hooked everything back up and together and so far it's running good. Took me about 30 minutes and I've never done it before. I didn't do all eight even though I bought all eight and plugs. I felt like the term if it ain't broke don't fix it was good to follow as I heard stories about stripping out and breaking plugs in the aluminum block engines, and I definitely don't have the money to replace or fix that. Someone told me that the misfire can jump from one coil to the next after replacing just one. I don't see how but like I said I'm not a mechanic. If anyone has any suggestions on what I did versus what I should of did or about if I should go ahead and change all the plugs and coils please let me know. Ive heard of Thank you all for all your help and information.