My 2010 4 door rubicon pings when I use the recommended octane fuel. When I switch to high test it goes away. Is this a engine problem?

 

Stock air filter? Is it clean or dirty? How's the air flow sensor?

 

And its not necessarily an engine problem, probably a electronic error thats getting your air/fuel mix wrong and causing the pinging

 

Thanks for the input. I will have to take it back o the dealer. See if they can check electrical.

 

Clean the MAF. If it is reading low due to grime it will go lean.

 

There us no MAF on a 3.8, its a speed density type. Most likely either carbon buildup and/or oil consumption. You could also check your pcv valve. Also make sure you keep up with coolant maintenance and spark plugs too!

 

SeaFoam... Run in oil 500mi before oil change, brake booster, and in gas tank... a few threads on the the specifics here. Probably carbon build up on top of cylinder heads... Should help at least

 

Thanks for all the advice. If anyone has any other suggestions please comment.

 

There's a good chance it is carbon buildup. Go to the local dealer and grab a $10 can of Chrysler combustion chamber cleaner. This stuff works great just follow the directions. I always let engine sit much longer than they recommend though before restarting

 

Ay other suggestions