boilermaker27

I have a 2015 Malibu with the 2.5 engine. I have been having problems with the engine suddenly running very rough and then dying. The engine starts with no problems, a few minutes later the engine get's very noisy and shakes the whole car and then it dies. It sometimes does it when driving slowly but at highway speeds it never does it. I just cleaned the mass air sensor and also put on a new throttle body. Previously I changed the o2 sensor bank 1 and also changed the vacuum line that runs from the plastic line from the air cleaner and throttle body to the two outlets on the valve cover. I did get two codes a while back one was for a lean mixture and the other vacuum leak. I checked all the vacuum lines, plus I did change the o2 sensor. Any ideas of what to do next? I failed to mention that the engine runs smoothly most of the time but this can occur any time when driving slowly and especially at start up when the engine starts to warm up.

mountainmanjoe

do some fuel pressure tests