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grand prix gt randomly stalls

A

Arzona Miller

New member
hey all u mechanics, hope someone can help a lady. i got general knowledge of cars and how they work, under the hood. my problem is 99 grand prix gt, 3800 v6. the car runs about 15 mins, dont miss, nothing...then dies.
the fuel relay , the fuel pump, fuel filter, coil packs and crank position sensor all been replaced. just had the cps done about a week ago. it run well for a week, never died/stalled at all, fueled up with 93 octane friday and put
gumout in it to clean injectors , and this morning , it died on my way to work, but i was rolling about 30 mph, put in neutral and it started back, and i went on to work, it sputtered for a second only. wasnt acting as bad before i re-placed cps, it died about 5 times in 10 mins, before that was replaced. the car runs fine otherwise, cant figure it out, any ideas?
 


Around the times before or after it stalls, if you put it in neutral does the speedometer drop to zero even if your moving? I'm wanting to say it's still the crank sensor, either the new one is faulty as well or the ring on the crank pulley may be damaged or very dirty.
 
ok answers to questions, comments: no codes. it has started back up for me the ten times its died on me. the lady that
owned it prior, had it die on her and she would go back an hour later and it would start. but it did have a week battery too
so i bought a new one to make sure that wasnt part of the problem. it has always started back with me, even if it died seconds later. i have tried to start it in neutral and yes it will start up, but not in any other gear; as to elminate possibility of
neutral switch being bad. the fuel guage also only goes up to 3/4 and back down after using the fuel, if this happens to mean anything. i think it has something to do with ventilation or pressure, but not sure becz of this, but the fuel sending unit is built into the fuel pump and has been replaced. its random and dont always die every time u drive it. it takes at least 5-7 miles usually when it does occur. it usually "cuts out" for a second once or twice before it stalls, at times it sputters on restart /take off, like fuel filter is bad or pump, but again been replaced. is it possible sediment or water is on bottom of tank , it seems to get worse if i fill the gas tank, unless it just coincidence. the ignition module tested good as well as the coil packs when i had the cps replaced too. hope this info helps. thx for all the replies. i also did notice the tach drop rpm to zero when it cut out , but it caught itself and kept running that time, didnt stall engine at all that day.
 


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