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sprinkles08, ASE Certified Technician
Category: Nissan
Satisfied Customers: 21570
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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We changed the ignition starter switch and now the fuel pump

Customer Question

We changed the ignition starter switch and now the fuel pump is not pumping enough gas to carburetor and we was wondering where the relay switch is located on a 2008 Nissan sentra
JA: How many miles are on the car? How old is the battery?
Customer: new battery
JA: Are you fixing your Sentra yourself? What have you tried so far?
Customer: yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: need to know where fuel pump relay switch is located
Submitted: 13 days ago.
Category: Nissan
Customer: replied 13 days ago.
we can only get the car to turn over under the hood but it will not start
Expert:  david craig replied 13 days ago.

Hi Im David, thanks for visiting the site. allow me to get that information for you. thanks.

Customer: replied 13 days ago.
ok thank you
Expert:  david craig replied 13 days ago.

i will call you when i get the information. thank you.

Customer: replied 13 days ago.
Customer: replied 13 days ago.
is there something you need to reset in order to get the 2008 Nissan sentra to start after changing the ignition starter switch with security system
Expert:  david craig replied 13 days ago.

well, when you try to start the vehicle does the security light go out ??

Customer: replied 13 days ago.
no it does not and we have done what the manual says as far as resetting it. We do not have the original key only the key that came with the ignition switch replacement part
Customer: replied 13 days ago.
the car won't turn over using key but can get it to turn over from under hood but it is not getting fuel to carb but fuel does come out of fuel pump
Expert:  david craig replied 13 days ago.

here is the location of the fuel pump relay, but since the security light doesnt go ut while cranking the engine. it really doesnt matter

Expert:  david craig replied 13 days ago.

let me see if i can find a reset for the anti theft.

Expert:  david craig replied 13 days ago.

Try closing all doors the trunk and the hood.

Insert the key into the drivers side outside door lock and turn it to the lock position and wait about 30 seconds.

That should do the trick

Customer: replied 13 days ago.
Thank you so much!
Customer: replied 13 days ago.
The key does not work the door locks is there a way to bypass the security system
Expert:  david craig replied 13 days ago.

stand by.

Expert:  david craig replied 13 days ago.

The NISSAN Vehicle Immobilizer System will not
allow the engine to start without the use of the
registered key.
If the engine fails to start using a registered key
(for example, when interference is caused by
another registered key, an automated toll road
device or automatic payment device on the key
ring), restart the engine using the following procedures:
1. Leave the ignition switch in the ON position
for approximately 5 seconds.
2. Turn the ignition switch to the OFF or LOCK
position, and wait approximately 10 seconds.
3. Repeat steps 1 and 2.
4. Restart the engine while holding the device
(which may have caused the interference)
separate from the registered key.
If the no start condition re-occurs, NISSAN recommends
placing the registered key on a separate
key ring to avoid interference from other

if this is not the case then the vehicle must be taken to the dealer to have a new key cut and coded to the vin.

there is no bypass for this system

Customer: replied 13 days ago.
Thank You!
Customer: replied 13 days ago.
buying the new ignition with the new key is not going to work
Customer: replied 13 days ago.
your saying that key has to be registered to that car and not just the ignition
Expert:  david craig replied 13 days ago.


Expert:  david craig replied 13 days ago.

if the transponder for the immobilizer does not recognize the key it will not let you start it

Expert:  david craig replied 12 days ago.

just checking in to see how its going

Expert:  sprinkles08 replied 9 days ago.

Hello and welcome to JustAnswer!

It sounds as if you've purchased an incorrect part for the vehicle. I'm gathering that what you most likely replaced was actually the ignition lock cylinder rather than the ignition switch as described. The ignition switch is an electrical part, the lock cylinder is where the key is inserted. If the engine now starts and dies due to installing an aftermarket lock cylinder that came with a key then it's because the key isn't correct. The correct repair would have been to replace the lock cylinder and have the correct tumblers installed so it matched the existing lock cylinders, keys and VIN. This lock cylinder can be removed and keyed correctly by a locksmith or dealer. If a functional transponder key is no longer present then a key will also need to be cut and programmed to the vehicle using a scan tool.