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Checking Spark Plug Wires

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Old Nov 11, 2012 | 07:28 PM
  #1  
Brando5641's Avatar
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From: Siloam Springs AR.
Car: 1998 Trans/Am, 1989 RS Camaro
Engine: LS1, LQ9 6.0
Transmission: 4L60E, 4L60E
Axle/Gears: 2.73, 2.73
Checking Spark Plug Wires

Im kinda confused here. Lower the ohm reading the less resistance right?
For instance a 4.4 reading is worse than a .700 and a .350 is the best correct?

Problem is my 98 trans am (stock) is missing after new wires so i pulled them to check resistance. The new cheepos i installed are measuring .700 ish and the old ones i pulled are reading around .350 and i have 2 that are .750.

What is confusing is I pulled a wire off the 5.3 in the camaro for reference and it measured 4.400.

WTF!?!?!?!?!?
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Old Nov 12, 2012 | 02:21 PM
  #2  
Brando5641's Avatar
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From: Siloam Springs AR.
Car: 1998 Trans/Am, 1989 RS Camaro
Engine: LS1, LQ9 6.0
Transmission: 4L60E, 4L60E
Axle/Gears: 2.73, 2.73
Re: Checking Spark Plug Wires

no one? I figured everyone knew this but me.
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Old Nov 12, 2012 | 04:39 PM
  #3  
cprmn14's Avatar
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From: Dixon, IL
Car: 91 RS
Engine: LTwon
Transmission: T-56
Axle/Gears: Both
Re: Checking Spark Plug Wires

sounds to me like you got a bad batch of wires.. Its never happened to me personally but i always see people on 'tech claiming it happens all the time.
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Old Nov 12, 2012 | 07:14 PM
  #4  
QwkTrip's Avatar
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Car: '89 Firebird
Engine: 7.0L
Transmission: T56
Re: Checking Spark Plug Wires

Spark plug wire resistance varies a lot by manufacturer and style of plug wire. You need to find out what is the specification for the wires you have. It may, or may not be inside spec.
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Old Nov 12, 2012 | 09:55 PM
  #5  
iansane's Avatar
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From: Tacoma, Wa
Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Re: Checking Spark Plug Wires

Low resistance doesn't automatically make it better, and higher resistance doesn't automatically mean they're bad. Like Qwktrip said you have to compare them to the rest of the wires and the spec the manufacturer claims. I had a horrendous missfire and found one of my taylor wires at a bit over 1200ohms while they rest were around 30. I went and bought a complete new set and they all tested between 80-100 ohms. Taylor said this was normal.
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