Nissan Repair: 2002 nissan sentra xe, fuel pressure regulator, nissan sentra

Question
my nissan sentra won't start it keeps turning over. i changed the fuel pressure regulator,cleaned the fuel throttle,replace the spark plugs, clean the fuel injector and it still won't start

Answer
Hi Natasha

I hope I can help your situation -

Cars do not start for 2 reasons, either it is not getting gas, or not getting spark, and you have to determine which one, and then continue on with the diagnosis.

To check spark -

First have a helper stand by in the car, while you pull off a spark plug wire. Stick a screwdriver into the wire so that it contacts the metal terminal in the boot. Hold it about 1/4" away from any metal surface and have your helper crank the car. CAUTION: while you are holding the screwdriver, do not touch anything metal or you may get jolted. If you see sparks jumping from the screwdriver edge to the metal surface, all electrical components are fine and it is a fuel issue. If there is no spark:

Check the distributor cap and rotor for corrosion or oxidation
Check the spark plug and coil wires for corrosion at the terminals
Check the distributor module (this requires technical equipment and expertise)
Also the car's computer may be the problem

To check gas

Open the access to the intake manifold and pour a little gas (about 1/2 tablespoon) into the engine (you can use starting fluid as well). Try to start the car. If the car starts and dies after a couple seconds, change the fuel pump. If it does not, then continue on below:



Hope this helps
aloha
calvin