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How To Test Your Coil Packs


Frankzao
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I borrowed an analog multimeter and here are the unbelievable results.

I say that because IT DOES MAKE A DIFFERENCE, whether you use a DIGITAL or ANALOG multimeter.

To recap. Using a Digital Multimeter, the ONLY measurement possible was between terminals 3&4.

This was true even on the BAD coil. So DO NOT USE A DIGITAL!!!

That being said, here you go.

 

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For orientation, the coil should sit in front of you with the spark plug boot in the air.

This leaves the terminals facing you. There are 4 pins on older coil packs and 3 pins on newer coil packs.

Left to right, they are numbered 1 thru 4. If it is a 3 pin coil pack, the #2 pin is not present.

 

I measured nine (9) coils. 1 of them I KNEW was bad, 2 of them were good, and 6 that I had just purchased.

 

The bad one is "B1".

The good ones from my car are "G1" & "G2".

The new ones are "N1" thru "N6". (N1 & N2 are of the 4-pin variety).

 

ALL measurements are in "K ohms".

"B" means black (common) lead on the first pin.

Example: "B34" means Black lead on #3pin and Red lead on #4 pin.

"R" means red (power) lead on the first pin.

Example: "R34" means Red lead on #3 pin and Black lead on #4 pin.

 

"No R" means "No Reading" not 0.00.

 

 

Test: B34 | B14 | B13 | R34 | R14 | R13 |

G1: 1.20 | No R | No R | 1.38 | 1.20 | 1.09 |

G2: 1.20 | No R | No R | 1.30 | 1.20 | 1.09 |

 

B1: No R | No R | No R | No R | No R | 1.19 |

 

N1: 1.40 | 16.0 | 14.0 | 1.40 | 1.25 | 1.19 |

N2: 1.40 | 16.0 | 14.0 | 1.39 | 1.30 | 1.19 |

N3: 1.40 | No R | No R | 1.38 | 1.20 | 1.10 |

N4: 1.39 | No R | No R | 1.25 | 1.30 | 1.20 |

N5: 1.39 | No R | No R | 1.20 | 1.39 | 1.20 |

N6: 1.40 | No R | No R | 1.25 | 1.39 | 1.20 |

 

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So as you can see, if the coil is bad you will only get a measure at R13. Otherwise it is good. :lol:

 

The 4-pin coils were the only ones to measure on B14 & B13 tests.

They also measured between 30 and 70 for B2 to 1,3, or 4. R2 to 1,3, or 4 was no reading.

 

I am running G1, G2, and N3 in my car. I think that is why R13 is lower for N3 than the other "N" coils.

 

 

Hope this helps.

 

-Zao

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