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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Nissan
Satisfied Customers: 1593
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles
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Hi I have a question

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

hey how are you

ok what is your question ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 1 month ago.
My car won't start. It's cranks but does not turn over. We tried replacing the cam shaft sensor and the crank sensor with no luck. We checked spark plugs to see if there was a spark and there was.

ok we have spark , but do we have fuel

we need fuel & spark to start

check fuses , fuel pump relay

do you hear the fuel pump coming on for few secs when you turn switch from off to on , it should prime ?

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 1 month ago.
No we don't here it prime

ok so fuel pump not running let see why

check fuse and relay , if the relay and fuses are good , then go to fuel pump and check for power on connector ,if you have power then replace fuel pump

Let me know if you need anything else on it , just reply back here & we can continue.

if you are good , Please Kindly rate me.

Hope I was helpful to you

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Thank You

Chad Farhat
ASE Certified Tedchnician

Customer: replied 1 month ago.
Ok after changing the fuel pump and the relay still no success

do you have power at pump ?

what are you missing at the connector, i mentioned to check at pump earlier ?

this is the wiring circuit

you have a 15 amp fuse then it goes to the fuel pump relay

The ECM( computer grounds the fuel pump relay to give power to fuel pump

please review and see what are you missing and you will know why pump not coming on , is the ecm or the wires in between

just follow the circuit

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

There should be a black & yellow wire at the fuel pump that should be power 12 volts from relay ,check there ?

and also there should black wire , that is ground .

there is a black and orange wire coming from ecm , what are you getting there

with this info you should be able to know what is cause the fuel pump not to run .

let me know

Chad

Please let me know if you need anything else on it, just reply back and we will continue

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Thank You
Chad Farhat
ASE Certfied Technician

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