HELP!!! My 2006 3.7 durango was running rough and starting to shut off at stops. I brought it to a shop in Tallahassee, Fl to put on the tester to see what codes may come up. The code said that the number 5 cylinder was not firing or was not firing completely. The plug was pulled to find that it was rusted/dirty/gunked up and preventing the spark from happening. They said that the machine recommended to change the coil and the plug. They said it would be about 230 to do this. I am active duty stationed in another state (Valdosta, GA) from where my wife and the Durango is so i had to tell him go ahead and do it. If i had been there i could have done it myself. He did give me a small military discount. The book called for 2 hours to do the job. So now since the car has about 50,000 miles on it, i figured i would go down there and replace the other 5 plugs to do a small tune up on it. The place where the work was done said they don't recommend changing the other plugs/coils unless there is something wrong since it is so costly and time consuming. I have worked on and flown airplanes for years and worked on many cars and sure i can do it myself but do you really have to replace the coils and the plugs together? They put an NGK Irridium plug in that #5 cylinder and the car runs much smoother. I wanted to just replace the plugs in the other 5 so there would be a freash set of plugs all the way around but they are saying they don't recommend it unless there is a problem. I am 47 years old and have never heard of that before. Is there any wisdom to this? Is 230 bucks too much to replace 1 coil and plug? I called a Dodge dealer that i used to work with when i was stationed at another base and he said that was in the ball park of what he would have charged. Any help? Ideas? Thank you in advance!!!

Scott
sairlifter@aol.com

 

I changed my plugs at 30,000 miles and plan on doing it again at 60,000 miles. I would guess $300.00 to change all the plugs, EGR valve, and clean the throttle body,
FF