# 1991 Nissan Sentra cranks but won't start **URL:** \ **Category:** Power/Fuel\ **Tags:** nissan, sentra, gasoline\ **Created:** [June 7, 2020, 12:38am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428 "2020-06-07T00:38:16Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Franklin-25](https://avatars.discourse-cdn.com/v4/letter/f/4491bb/32.png) [@Franklin-25](https://community.cartalk.com/u/Franklin-25)\ **Post date:** [June 7, 2020, 12:38am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/1 "2020-06-07T00:38:17Z")
My 1991 Nissan Sentra will crank but wont start unless I use starting fluid and then it dies shortly after I replaced the fuel filter and the fuel pump ---
**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\ **Post date:** [June 7, 2020, 12:48am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/2 "2020-06-07T00:48:39Z")
It sounds from here you are not getting fuel. Turn on the ignition, but don’t crank the engine. Do you hear the fuel pump run for 2 seconds or so? If no, check for power at the fuel pump, and then check for power at the fuel pump relay. Also, have someone else crank the engine while you smack the bottom of the gas tank with your hand. If that works, it’s temporary. Have a new fuel pump installed. ---
**Author:** ![Franklin-25](https://avatars.discourse-cdn.com/v4/letter/f/4491bb/32.png) [@Franklin-25](https://community.cartalk.com/u/Franklin-25)\ **Post date:** [June 7, 2020, 12:55am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/3 "2020-06-07T00:55:53Z")
I just replaced the fuel pump and fuel filter ---
**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\ **Post date:** [June 7, 2020, 12:57am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/4 "2020-06-07T00:57:09Z")
Then, I’m going to be blunt, you messed something up. ---
**Author:** ![Franklin-25](https://avatars.discourse-cdn.com/v4/letter/f/4491bb/32.png) [@Franklin-25](https://community.cartalk.com/u/Franklin-25)\ **Post date:** [June 7, 2020, 12:59am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/5 "2020-06-07T00:59:37Z")
Look I’m on here looking for some helpful advice I’m positive that I didn’t mess up anything I do know what I’m doing I’m not a idiot ---
**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\ **Post date:** [June 7, 2020, 10:02am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/6 "2020-06-07T10:02:13Z")
Either your new fuel pump is bad or You replaced a working fuel pump and that wasn’t the problem. Is your fuel pump getting power? ---
**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\ **Post date:** [June 7, 2020, 11:45pm UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/7 "2020-06-07T23:45:03Z")
> [@old\_mopar\_guy](#): > > It sounds from here you are not getting fuel. Turn on the ignition, but don’t crank the engine. Do you hear the fuel pump run for 2 seconds or so? If no, check for power at the fuel pump, and then check for power at the fuel pump relay. Sounds like a good first step. ---
**Author:** ![Franklin-25](https://avatars.discourse-cdn.com/v4/letter/f/4491bb/32.png) [@Franklin-25](https://community.cartalk.com/u/Franklin-25)\ **Post date:** [June 10, 2020, 4:22am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/8 "2020-06-10T04:22:27Z")
The fuel pump is getting power ---
**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\ **Post date:** [June 10, 2020, 9:16am UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/9 "2020-06-10T09:16:49Z")
Then I would do a fuel flow volume test. If there is sufficient flow at the fuel rail, then you probably have electrical problems with the injectors circuit. ---
**Author:** ![shanonia](https://avatars.discourse-cdn.com/v4/letter/s/9de053/32.png) [@shanonia](https://community.cartalk.com/u/shanonia)\ **Post date:** [June 10, 2020, 2:53pm UTC](https://community.cartalk.com/t/1991-nissan-sentra-cranks-but-wont-start/165428/10 "2020-06-10T14:53:22Z")
If you hook up the fuel pump so it gets power constantly, what happens? Maybe the fuel pump is shutting off when the key springs from Start to Run position - or if the oil pressure circuit, detecting no OP, is shutting off the pump.