Car is a 91dx auto. bone stock. It just died on me. I tapped the gas and got a stumble/light backfire through the intake which has happened a time or two before. I'm sourcing a TPS to remedy this, but it died after the backfire. valve timing has been verified (belt was a tiny bit loose and retightened but all marks are dead on and not 180 out), have injector pulse, have spark, have fuel pressure. I'm lost now. any ideas? when i turn the key on i get 1 quick light on the ecm then no codes thrown. This is killing me.