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I have a 2003 chevy venture, problems started with it about 2 weeks ago. While i was driving down the road it would just shut off as if i was shutting off the key, i would pull over and it would start right back up most of the time other times it would have to sit a few minutes to an hour or so and it would start agian. Then the van started acting like it was running out of gas as I would try to go uphill or even drive on a flat surface. It would spit and sputter. Took it to advance auto and they used the hand held computer and a code came up for a sensor which was the "vapor pressure sensor" it is located at the top of the gas tank on top of the fuel pump, so that part was 42 bucks. My fiance replaced the sensor, the van finally started after a few minutes of spitting and coughing and grumbling, it seem to smooth out and it was running fine. I took it down the road it was fine, I took my daughter across town to her practice and after that I decided i wanted to go to the store, i had to go up a long hill (mountain if you will) and it started spitting goin up the hill, made it to the store, left there then and stopped at the gas station, put some gas in it up to a half a tank added some dry gas to it, it ran fine the way home about 5 miles, a couple of days later i tried to go up the hill and it started spitting and sputtering very badly but never stalled this time, but i couldn't make it no farther i had to turn around and drive it home. So yesterday I took it down to the local garage and they had a computer that read misfire code and emissions but it has an exhaust leak so that could be the emissions code, the guys at the garage told me to start with a tune up, so 60 bucks later for new spark plugs and wires it started and the check engine light was even off, but I went up the hill and it was still spitting a tiny bit, went to advance auto to get on the computer again it was still reading the same code for the sensor i had replaced, so i went to auto zone to use their computer, codes came up for emissions and misfire, they had my fiance convinced to put on a new gas cap, well that didnt solve the problem, brought it home now it will not start at all, it will crank but it will not start! The problem is not the fuel pump because you can clearly hear it running and my fiance took the filter off and blew threw it and put it back on, I asked the guys at the garage what to do if the tune up didnt fix it and they said "that should take care of the problem' which the spark plugs were very very bad so i thought for sure we had the problem fixed! can someone please help before i set this thing on fire!!! I have read every single post on here and alot of people had the same problem but the people that had the same exact problem im having didnt have solution.
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