I'm a new Dodge Durango owner. 1st time ever owning a dodge. its a 99 durango adn has a miss fire on cylander 5. any suggestions? i have been told by my father its a valve job? all he did is take the cylander number 5 plug wire of and then said yup its a valve job. the cheapest quote i got was 850. can you help

 

I would advise changing the plug with another one and see if the other cylinder then has the misfire. If so then I would change all the plugs out, it is recommended by dodge and a lot of seasoned members here to get the cheap champion copper plugs. Hope this helps.

 

start with the simple stuff, do a tune up, new plugs (cheapo champion copper core) wires, cap and rotor(brass contacts) and see if that helps, if not try swapping the fuel injector from cylinder #5 to a different cylinder. always start with the simple stuff for diagnosis instead of jumping into a big time repair.

 

To simply diagnose a head job by removing a spark plug wire is just plain stupidity!....Sorry but true.


A misfire is plain and simple a misfire. It is 95% of the time a simple spark or fuel injector issue. All your dad did was remove a plug wire and nothing happened so what in fact he found was the actual cylinder that has the misfire. Now that misfire could be just a bad spark plug, bad spark plug wire, bad injector, bad pick up sensor, or bad crank sensor.

To come out with a diagnosis of a bad valve without a leak down test, compression test, or any other actual factual testing procegure is simple plain ignorance and stupidity. Now I'm not trying to come off as an *** here, I'm just stating the truth.

1. Go out and buy a 2 dollar cheap Champion Copper spark plug and gap it at .040
If that doesn't work:
2. Swap a wire and see if the issue moves to the cylinder that now has that wire, if so replace the wires.
3. Swap the injector with a different cylinder and see if the issue follows it, if so replace the injector.
4. Replace Cap and Rotor.
5. Read the code it should be throwing.

Then start sensor diagnosis.