I am buying a 1997 Concorde 3.5L with 128K on it, is there anything i should work on? What are some good things to do to get a little bit more performance out of this engine? what spark plugs work best in the 3.5?

 

make sure timing belt has been changed every 100k and water pump champion plugs

 

check the fluxcapacitor and make sure you have plenty of plutonium , you dont wanna get stuck in the old west.

 

If you haven't already purchased the vehicle, I would recommend not buying. It has a host of issues. Google 1997 Chrysler Concorde issues. You'll be reading for days.

 

I was not aware of this issue , due to seeing all of the later model concorde's being sold at dealerships and ebay for top dollar. they seem to go for a lot of money?

 

They're nice looking cars and they go for top dollars. However, I have one that I purchase last year. If I didn't know how to fix cars I would have put thousands in to it already. A lot has been trial and error but be prepared. Transmission issues, electrical issues, overheating issues; you name it.