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Nissan/Datsun Sentra GXE: 03 NISSAN SENTRA WONT START NO SPARK

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03 NISSAN SENTRA WON'T START...
03 NISSAN SENTRA WON'T START NO SPARK AT COILS , REPLACE BOTH CRANK,CAM SENSORS STILL N0 SPARKS I WAS LOOKING AT YOUR NOTES WITH SAMES TYPE OF PROBLEMS BUT MY NISSAN DOSN'T HAVE SPARKS AT COIL IT GOT POWER AND GROUND AT COIL BUT SINGAL WIRE AT COIL STAY ON STEADING ALL TIME
Submitted: 6 years ago.Category: Nissan
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Answered in 2 minutes by:
11/3/2011
Nissan Mechanic: Mike V., Nissan Technician replied 6 years ago
Mike V.
Mike V., Nissan Technician
Category: Nissan
Satisfied Customers: 25,887
Experience: Nissan factory trained and Certified Subaru Technician.
Verified
Greetings Sir or Madam and welcome to JA! I will do my very best to assist you with your problem.
Hi there!
Do you know if you have injector pulse?
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Customer reply replied 6 years ago
No pulse Got 12.4 volt No trigger
Customer reply replied 6 years ago
Relist: Other.
I still have not got an answer
Customer reply replied 6 years ago
How Long Dose It Take between Questions / answers
Nissan Mechanic: Mike V., Nissan Technician replied 6 years ago
hmm, ok
Was the engine changed, head gasket? Timing chain? anything like that?
Sorry for the delay, this will go quicker now.(computer issue)
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Customer reply replied 6 years ago
No was just driving started loosing power I turn car off now it dosn't start
Nissan Mechanic: Mike V., Nissan Technician replied 6 years ago
Ok, no pulse or fire, has to be the ecm.
I say this because the cam and crank sensors are what drives the spark and injector pulse. If you lose both and the sensors are good, there really isn't much left.
Unless for some strange reason the car jumped time. If you can do a compression test, you might find this to be the case. Odd as it seems, way out of time will cause this.
Also,just as a side note, make sure the cam and crank sensors are plugged in tight.
If you have a code reader, check for codes.
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Customer reply replied 6 years ago
I will try an ECM and let you know it got good compression
Nissan Mechanic: Mike V., Nissan Technician replied 6 years ago
Also, is the signal wire for the coil grounded all the time even with just the key on?
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Customer reply replied 6 years ago
Yes all my signal wires are grounded all the time
Nissan Mechanic: Mike V., Nissan Technician replied 6 years ago
Yeah, they should be open. I think the ecm has gone bad. It is what grounds the signal wires.
You will probably have to have the new ecm programmed by the dealer for the immobilizer to work. However, security only shuts down the injectors, so if you install another ecm and have spark, you will know it was no good.
Mike V.
Mike V., Nissan Technician
Category: Nissan
Satisfied Customers: 25,887
Experience: Nissan factory trained and Certified Subaru Technician.
Verified
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Mike V.
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