Can anyone help! 2000 Dodge Durango engine light on and it shows code P308 and when I took out the plug the tip was gone? Any ideal on what to do?

 

will need a clear pic of the plug to attempt any diag as to why.

 

Don't have the plug anymore but the part that you gap was totally gone can you still help?

 

well I can give you some causes. 1st & most hopefully, defective plug with a bad weld on the electrode.

2 very lean burn, like bad or plugged injector. the ground electrode is pretty lightweight compared to the rest of the combustion chamber & lean burn can run critticaly hot, electrode goes first.

3 heavy knock/ping in that cyl. predetonation event. can also do that kind of dammage.

did it look burnt off? or did it otherwise look fine? did it look like the weld may have let go?

without seeing the plug & more so with out seeing the truck it's difficult to say.

try using a temp gun & see if that runner gets hotter than the others. the other thing you can do is use a scanner to get data stream, check the readings on o2 sensors, then disable the cyl via the ignition wire, again by disconecting the injector. compare what you get in o2 reading change with a couple other cyls in the same way. if you see a big variation on just that hole probably an injector. otherwise could be a heavy carbon buildup or oil injesting issue.

You could also just keep checking that plug periodicaly & see if it's doing the same thing or was just a fluke.

 

Oh, check for vacume leaks. & by runner I mean exhaust manifold runner.

 

Place a collapsible/extendable magnet down the cylinder and make sure there are no pieces down in there and get em out if you can.

 

+1 on what hydra said make sure to get any pieces that fell down in the cylinder out before running it anymore