misfires

Hey all, I need help to diagnose my issue with misfires. First off, let me describe to you my engine bay. I bought the car with an engine swap and it already had a SRI with no cat converter. The car ran fine for 3-4 months and then started loosing power and finally started misfiring approx...

hey guys, so i have been having a very hard time diagnosing what exactly is causing random misfires on my celica, i have a 2000 gts, only engine mods are a trd intake and trd exhaust with stock headers. so the car was throwing a p0171 lean code but i fixed that with two new o2 sensors and a new...