so i have a 89 honda crx and it has a fully ls engine swap in it and yesterday i was driving on the highway and when i got off my car started shutting off and then i started hearing this knocking coming from the engien and i got off and looked and it was coming from the bottom of my engine after that i drove it home and everytime i took it off gear to stop it would shut off but the engine would stil knock when i was in gear .. if i was accelerating it wouldnt knock as much as when im idleling does anyone know what the problem would be?