Help Needed! Injector or Thermostat Trouble
After the service engine soon light flickers off there is usually a small poof of smoke that comes out the tail pipes. It feels like there is something clogging up the engine... IDK what the problem is. Injectors or Thermostat I have no idea.
I have replaced the fuel pump and O2 sensor so I doubt its either of those.
Any help would greatly be appreciated!

