Testing Plug Wires
Thread Starter
Drifting
Joined: Mar 2003
Posts: 1,533
Likes: 171
From: Oklahoma City OK
Testing Plug Wires
I tested my plugs wires today (in the process of chasing down a 100rwhp gremlin). They ranged around the 750 area in resistance, but one was in the 800s. Are these numbers too high? I don't know much about spark plug resistance to know if there is a problem.
Tech Contributor
Joined: Jan 2007
Posts: 19,115
Likes: 1,038
From: Dyer, IN
If you go by the letter of the service manual, any resistance reading above 700 ohms dictates replacement.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,396
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Most GM OEM plug wires read 330-350 ohms. The spec is 275-700 ohms. If any are on the HIGH side,, I would replace them with the GM Performance Red Wires. There one of the best wires on the market and quality/fit/ finish are OUTSTANDING!!
Gene at GM Parts House house have them for around $60. www.gmpartshouse.com
BC
Gene at GM Parts House house have them for around $60. www.gmpartshouse.com
BC
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Best wire on the market IMO is the MSD 8.5mm Superconductor Wire. It lives where others fail and comes with heat protection options from us. 40 ohms of resistance and heat resistant to 400* or 700* with the hi heat boost option.. multi angle terminal, double crimp system does not fail where other wires break from manipulation
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
Last edited by 99blancoss; Oct 19, 2011 at 11:25 AM.
Melting Slicks
Joined: Jul 2006
Posts: 2,332
Likes: 31
From: Silver Spring MD
Try using copper wire - 0 Ohms and lots of ignition noise
BTW 700 to 800 ohms is nothing. My Taurus has readings for 2K to 7K.
At 25,000 to 35,000 volts looks like a short circuit.
Last edited by bighank; Oct 19, 2011 at 06:51 PM.
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Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
Best wire on the market IMO is the MSD 8.5mm Superconductor Wire. It lives where others fail and comes with heat protection options from us. 40 ohms of resistance and heat resistant to 400* or 700* with the hi heat boost option.. multi angle terminal, double crimp system does not fail where other wires break from manipulation
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
Le Mans Master
Joined: Jul 2010
Posts: 5,923
Likes: 705
Best wire on the market IMO is the MSD 8.5mm Superconductor Wire. It lives where others fail and comes with heat protection options from us. 40 ohms of resistance and heat resistant to 400* or 700* with the hi heat boost option.. multi angle terminal, double crimp system does not fail where other wires break from manipulation
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
Melting Slicks
Joined: Dec 2003
Posts: 2,857
Likes: 2
From: pawleys island sc
Best wire on the market IMO is the MSD 8.5mm Superconductor Wire. It lives where others fail and comes with heat protection options from us. 40 ohms of resistance and heat resistant to 400* or 700* with the hi heat boost option.. multi angle terminal, double crimp system does not fail where other wires break from manipulation
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
AT $58 delivered its the best value on the market for a spark plug wire and one of the best quality, come in red or black.
http://www.mcssl.com/store/cc-perfor...81a6a08596362b
that's a great price.
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
You don't need the heat shields the boot is good to 400*F radiant heat temp and heat shield keep you from being able to manipulate the boot properly
Your a complete tool. My MSD wires are 100% made in Oregon and guaranteed for life... but you keep on stalking the MSD threads, it gives you something to do.
My wires are guaranteed for life.. show me another wire that does that? They also are rated at about 40 ohms.. are 8.5 mm vs 7mm and have a hi heat silicone jacket.... GM wires need the heat shield to keep from drying out and craking.. MSD does not.
There seems to be a few misinformed people in this thead... one of them is a stalker who always bashed my MSD the other two are just plain misinformed... I can post up the anatomy of the wires if you want to see the real difference and why the MSD terminal are superior... it isn't even close
Taylor and most if not all other wires have breakage issues at the spark plug terminal when they are manipulated... Its an internal break you cant see and 100% effects the way the car performs.
Last edited by 99blancoss; Oct 20, 2011 at 11:18 AM.
Drifting
Joined: Jul 2005
Posts: 1,484
Likes: 27
From: Torrance Calif
Just installed a set of Granatelli "Zero OHM" wires I got from Byun Speed.
Come with heat shields and are very stout.
I use these on my V also.
I have measured (four wire method) resistance of MSD and stock against these and they are the lowest in resistance of the three.
Come with heat shields and are very stout.
I use these on my V also.
I have measured (four wire method) resistance of MSD and stock against these and they are the lowest in resistance of the three.
Tech Contributor
Joined: Jan 2007
Posts: 19,115
Likes: 1,038
From: Dyer, IN
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
I've tried MSD stuff in the past-JUNK!
Tech Contributor
Joined: Jan 2007
Posts: 19,115
Likes: 1,038
From: Dyer, IN
Former Vendor
Joined: Apr 2006
Posts: 2,470
Likes: 2
From: Portland OR
St. Jude Donor '10-'11-'12
Just installed a set of Granatelli "Zero OHM" wires I got from Byun Speed.
Come with heat shields and are very stout.
I use these on my V also.
I have measured (four wire method) resistance of MSD and stock against these and they are the lowest in resistance of the three.
Come with heat shields and are very stout.
I use these on my V also.
I have measured (four wire method) resistance of MSD and stock against these and they are the lowest in resistance of the three.
We have been looking at a 0 ohm wire for a logn time but it is not recommended on these cars
Drifting
Joined: Jul 2005
Posts: 1,484
Likes: 27
From: Torrance Calif
Don't know where you get your info on "0" ohm, but OBD II approved.
http://www.granatellimotorsports.com...mp-334-24.html
Last edited by heavymetals; Oct 20, 2011 at 03:14 PM.