Check fuel and spark
bad fuel will cause engine run rough stall out a lot vechicle wont start
no it will run rough and stall out
Possibly the Head Gasket is blown.
A bad spark plug or spark plug wire will cause your car to run rough. A dirty air filter will also cause your car to run rough.
AC runs on the battery. If the car is off and you run the AC, then start the car, it will stall.
vacuum leak,map sensor
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O2 sensor, if you have replaced it already, pull it out and make sure it hasn't burned it again. Jeeps can be notorious with these O2 sensors.
after start car smell gas why?
One of the reasons for a 2003 Nissan Sentra to run rough and stall out when it comes to stop is a bad oxygen sensor. Another cause for the running rough could also be a dirty air cleaner.
The car will start but it will run rough and will probably overheat and cause worse problems.
My guess would be that your FUEL PUMP is going bad. When a fule pump goes bad the car will stall and or start to run rough. Hope this helps. I have all Chrysler cars and this has been my expeirence on them.