Hey my car is a 3.5 v6 engine n the problem is it starts but stops in like 5 seconds even when u step on the gas. we also change the fuel pump ,fuel filter,a few sensors, alternator n we just can,t find the problem It,s a 1997 chrysler intrepid

have you had the fuel pressure read from the pump ? i'd have the OBD codes read as will tell you which sensor/switch is at fault , that was bad luck if the pump did fail , i think it's more likely a sensor/switch issue , keep me posted if you wish

1st, check to see if the fuel pump runs for 3 seconds when you turn the key to run (not start). If it doesn't run, then check the fuel pump fuse & relay in fuse box under hood, if OK, (spray starting fluid in the intake to see if engine fires at all), if no fire then look towards the ignition as the problem. There are 5 things need to start an engine: 1. fuel (delivered & pressure), 2. air, 3. spark (distributor/ignition module or pickup coil), 4. rotation & timing, 5. compression. any of these that are wrong or not there, the engine fails.

It may take 3-4 times cranking for a few seconds,
with a 5 second pause between to get fuel up to the engine. Also may have sucked up
some dirt/debris into the fuel pump after running it dry. May want to change fuel filter.
you can try to have someone bang on the bottom of the tank while someone else
cranks engine. Sometimes this will free up a stuck fuel pump. good-day!!

Hello
Check your fuel pump in the tank it could be the problem. if you put your ignition on just befor start you should hear it pumping for a few seconds then stop, with out that pump you not going to start her.
i also have a nissan V6 like that
Thanks

i think you might be right it sounds like your engine is getting over fed fuel you are probably not getting very good fuel mileage either the 3.8 and 5.0 would defintely require the same volume of fuel it is probably playing havoc on the pressure regulators i would get another fuel pump and start there

Your problem is common in the RX-8. It occurs when you start a cold engine and shut it off before it reaches normal operating temperature. If your car does flood, you can first try depressing the accelerator completely and holding it (which shuts off the fuel pump) and then crank the motor for about 10 seconds (not longer or you may damage your starter). If this procedure above does not work, here is the technique a Mazda dealership will normally use (to be performed at your own risk): 1. Use jumper cables to connect to another car battery. 2. Unplug Air pump connector (the black circular motor housing to the left of the oil filler cap) 3. Take fuel pump fuse out (number 22, a 20 amp, 3 from the top of the second column of the fuse box 4. Crank for 4 seconds, pause for 2 seconds, repeat for about a minute 5. Leave for a minute 6. Crank for 4 seconds, pause for 2 seconds, repeat for about a minute 7. Put fuel pump fuse back in 8. Crank for up to 10 seconds, if it catches but doesn?t start, stop cranking 9. If not started go back to step 3 10. If started, wait 30 seconds for oil pressure to rise 11. Stand on throttle until white smoke stops coming out of the exhaust 12. Disconnect jump leads 13. Leave to warm up on idle for a few minutes 14. Put air pump connector back on (see note 3) 15. Go for a nice long drive to recharge the battery

sounds like your fuel pump has retired on you,running you car low on gas is hard on pump,they are cooled by the gas an are lubercated by the gas, I hope this helps you

Oil pressure sensor is part of the fuel circuit. You changed engines, did the new one have the same sensor?

You mention no check engine light, and all the work you've done leave one solution; Your catalytic converter is clogged.

When you replace you catalytic converter your issues will cease. This is a very common problem, and a simple fix.

I hope this information helps and I wish you luck with your repair.

I i were you i would check the ignition. it sounds like you are only connecting some of the time. And yes it is very normal to hear the fuel pump kick on when you turn the key to the on position.