Car problems

Tiny
MUSTANGSALLY38
  • MEMBER
  • 2003 NISSAN SENTRA
  • 4 CYL
  • FWD
  • MANUAL
  • 114,000 MILES
I have a 2003 Nissan Sentra 4cyl. Recently the car has had episodes where it does not want to start. It acts as if it isn't getting gas, or has gotten too much and is flooded. It backfires as if it had a carburetor, but it is fuel Injected.
The injectors have been cleaned, plugs have been replaced, throttle body has been cleaned, but still have a problem. What could be the cause?
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Wednesday, January 5th, 2011 AT 9:12 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do below to determine if its fuel or spark problem-

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Wednesday, January 5th, 2011 AT 9:23 PM

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