Dear Pros,
I have a 1998 Dodge Grand Caravan. It has 189,000 miles in it. We do the maintenance on a regular base. Like changing oil every 3,000 miles, filters every 6,000 miles. We also replaced the spark plug wires in 2007 and the battery. We use this as our work van on weekends and we put about 500 lbs supplies in it. There is nothing wrong with any part in the car, we just noticed a huge amount of power loss. We also noticed that we have to fill the radiator with coolant about 3 times a month there is no water leakage that is noticeable. Since 2004 we put 3,600 miles in it for business purposes on summer weekends. Weekdays we don't use the car at all only for nearby shopping.
What should we do to regain the power to the motor?

 

Maybe your power loss is from an plugged exhaust system. You may want to ck that first.

 

That is a lot of coolant loss, You may have a bad head gasket, is there an excess of smoke at the tailpipe and is the oil normal color?