It burns all the ignition coils

Tiny
EFSILVA63
  • MEMBER
  • 2005 NISSAN ALTIMA
  • 2.5L
  • 4 CYL
  • AUTOMATIC
  • 130,000 MILES
Hello, I was driving at 20 mph speed and suddenly the car loss power and stopped totally itself and it did not start again.I connect the scanner but there is no communication. Checking the IPDM I found fuse 35 open and all 4 ignition coils smoking and too hot with signs of burned (see photo).I replace fuse, ignition coils, and erase P0300 code.I start the engine, okay, but after 5 minutes being running on ralenti, avg 750 rpm's, the speed lower at 200 rpm's, so I turn off the key and the ignition coil was burning, again the fuse 35 open. I replaced them and just when I turn the key to "on" position, the ignition coil begins to burn. I take some readings on the ignition coils harnesses in the on pos. Key. Please I will appreciate any help.
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Tuesday, June 9th, 2020 AT 8:20 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

This is an interesting one. Have you checked to make sure the grounds for the coils is good? A weak ground can cause heat issues. Also, have you checked to make sure the alternator isn't over charging? With your multi meter, check battery voltage with the engine off. Start the engine and check battery voltage.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Let me know.

Joe
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Wednesday, June 10th, 2020 AT 8:20 AM
Tiny
EFSILVA63
  • MEMBER
Hello Joe. 1). The battery voltage is 12.3vcd. 2). Resistance of each group pin of the harness is 0.2 ohms, the same readings are from negative battery terminal to ground chassis and also to the ground harness ground pins. So, I want to ask you where are located the ground terminals F15 and F16 which appears on the diagram you sent to me and also, F16 appears on the diagram I sent to you. There is also a "condenser 2" which I can not find and IT is connected between F16 and 12v coming through the "ECM relay". Thanks in advance.
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Friday, July 10th, 2020 AT 6:56 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Take a look at the attached pic and let me know if it helps.

Joe
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Friday, July 10th, 2020 AT 7:24 PM

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