I installed a D15b JDM into a 90 si hatch for a friend. I was called off to work in another state. when I returned a shop finished up the work. They went from obd to obd1. The car has a hard start and will not run over 3000 rpm. it ran this way before the obd to obd1 swap as well. I verified timing and is perfect. when running it runs smooth at idle up to 3000 rpm. The check engine light is on. Do I use the same method to check that timing light now that it is obd1? Has anyone had this same problem