The first three are located under round rubber plugs on the valve cover next to the oil cap, just give them a good tug and they'll come right off. You'll need an extension for your wrench to reach them. The second three are not nearly as easy. These are located under the big hunk of metal on the top of the engine called the intake manifold. Unfortunately, this requires you to take off the entire intake manifold to get to them. If I've lost you already or you aren't at least 100% comfortable taking the manifold off, DO NOT ATTEMPT THIS JOB! FYI - you will also need to purchase a replacement gasket for the intake manifold since you have to take it off.
2002 galant , can't find the spark plugs
You must remove the entire intake manifold for you to have access on the three spark plugs located underneath it. it is advisable that a qualified Mitsubishi technician should do this.
how to change number 6 spark plug on a 2006 mitsubishi galant
pcm or crank sencer
you need to take the intake off to get to the back three plugs...
if its got a v-6 in it it has 6, if its a 4 cyl. it has 4
A tune up for a Mitsubishi Galant can mean several things. But the most common focus is replacing the air filter, fuel filter, spark plugs, wires and routine maintenance.
It is most likely your spark plugs and or wire set. All of this is easy to change. There is another forum that explains how to change your spark plugs for your Galant.
Most had a V-6 under the hod, which would mean 6 spark plugs.
remove intake manifoled to access back 3 plugs. time consuming but can be done
When changing the spark plug gaps it is important to remember the gap size. The gap size for a 2003 Mitsubishi Galant 4 cyl spark plugs is 0.044 inches.
make sure the gapping on the plug is correct to what the vehicle needs