Ok so i have a 91 Ef hatch with a Ls/Vtec swap. It has an obd2 wire harness and an obd2 to obd1 jumper with a chipped p28 ecu. It will crank all day long but it wont fire, its getting good spark and plenty of fuel but it just wont start. Any advice on what to check will help me alot so please let me know if you have an idea of whate wrong. If you have any questoins please feel free to ask.