My car is like groundhog day with Bill Murray. Every morning I drive to work 10 miles on the highway. As I hit the the red light…it sputter and stalls. I start it and no problem off we go. This is the ONLY time it stalls during the day.This is EVERY DAY lol. Now it has thrown at times a P0171 lean code doing this so I can assume this is the problem. Once in awhile it throws a P0420 that the CAT might be acting up when on the HWY..
So far I have cleaned the throttle, checked for cracks at the accordion hose going from the throttle to the air filter box. I have changed the air filter. I have cleaned the MAF sensor and it responds accordingly with my OB2 scanner ( it doubled in value if I double the RPM’s). I thought maybe purge valve but it does not have any problems starting after adding gasoline.Starts right up.That is usually a hallmark symptom of the purge valve. Spark plugs shoulld be changed at this point because it is due base on mileage..I was thinking upstream or downstream O2 sensor but the live activity on my scanner while driving makes me not sure ( chagning accordingly). I have considered the dreaded PCV valve which is actually part of the valve cover and will probably be a real pain in the ■■■■ but…
Like I said it does drive fairly well…I mean a little rough I guess but nothing big. And only stalls coming off the highway in the morning after driving 10 miles. There is a sligh downward incline to the traffic light but doubt that matters.
A left turn. You say when you add gas you’re ok. I’m thinking fuel pump combined with a tank low on fuel. In all modern cars the fuel pump is in the tank. If you’re lucky there’s a round hatch on top of the tank to access the pump. Remove the rear seat, if you’re lucky you’ll see the hatch. If you are handy it’s not that big of a job. Do it outside with all the windows down. Don’t smoke!
