I live on an island and own a 1999 CRV with 120K miles on it. Just had a new radiator put on and now the car is intermittently sluggish but more so when going up hills. The engine light flashes when the car bogs down (mostly when on hills) but stops flashing when driving on flat areas but something still seems "off" even then. There are no dealers, only "backyard" mechanics here. There is one guy about 5 miles away (up a few hills) that can pull codes. Could there be a correlation between replacing the radiator and this new problem?