I have a 1991 CRX w/1.5L dual-port engine. Just put in a new block. Haven't been able to get it to start. Keep getting a code 16 (injector code). Checked the resistance on the injectors like the book says. They check out OK. Even tried putting in a couple of other ones that I had. Still get the code. Checked the main relay, it's OK also. Anybody got any ideas? Thanks.