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Are my ignition wires out of spec in ohms? #4440791
06/25/17 02:21 AM
06/25/17 02:21 AM
Joined: Aug 2005
Posts: 1,546
stamford, CT
ziggy Offline OP
ziggy  Offline OP
Joined: Aug 2005
Posts: 1,546
stamford, CT
Hi again all:) car in question, is a 9 corolla VE. yesterday used a multimeter, set at 20k ohms, and tested 2 ignition wire....it read 5.81-5.83 ohms. tested gain, and a 3rd time, same wires, the same reading. My haynes books, says recommended ohms is 10,000-20,000. the wires, i bought 4 years ago, from NAPA, mileage plus. i know thier lower ohms, but still...should they be replaced? they have 30,000 miles on em now.
I saw rockauto has denso wires, for $33/dealer wants $100,. think the rockauto ones are chinese roippoffs?

Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440799
06/25/17 03:29 AM
06/25/17 03:29 AM
Joined: Dec 2009
Posts: 5,178
Tn.
CourierDriver Offline
CourierDriver  Offline
Joined: Dec 2009
Posts: 5,178
Tn.


this may help


turn in your old jackets, shirts and other clothes to a Salvation Army or any homeless shelter this year...
Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440819
06/25/17 05:02 AM
06/25/17 05:02 AM
Joined: Dec 2003
Posts: 9,930
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,930
Florida, Cape Coral
Yes, replace them. Ed


CX5 Touring 2.5L :-)
Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440833
06/25/17 05:26 AM
06/25/17 05:26 AM
Joined: Jan 2011
Posts: 2,837
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,837
N.Ohio
If they are over 5k ohms per foot, replace them. Also, while the ohm meter is connected, move the wires around and make sure reading is stable and doesn't indicate a momentary "open". If the wires do not exhibit any of these and there is no arcing present when wetted down under operation, they are ok.
Wires last a long time and are often replaced when they are perfectly fine.

Last edited by Lubener; 06/25/17 05:29 AM.

The "thinking" man's friend.
Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440868
06/25/17 06:45 AM
06/25/17 06:45 AM
Joined: Jun 2003
Posts: 33,595
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,595
ME
Rockauto will not be chinese ripoff, at least not under the Denso name. Your dealer is the real ripoff. wink

Wierd that a 2009 doesn't have coil-on-plug but Toyota is conservative at times.

Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440889
06/25/17 07:09 AM
06/25/17 07:09 AM
Joined: Sep 2014
Posts: 1,491
Toronto Canada
WobblyElvis Offline
WobblyElvis  Offline
Joined: Sep 2014
Posts: 1,491
Toronto Canada
If the engine is running fine, why would you replace them? 30,000 miles on ignition wires is nothing.

Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4440900
06/25/17 07:28 AM
06/25/17 07:28 AM
Joined: Nov 2004
Posts: 1,864
SD
zrxkawboy Offline
zrxkawboy  Offline
Joined: Nov 2004
Posts: 1,864
SD
You were on the 20k setting, so your reading was 5.8k, not 5.8 ohms. I think your wires are just fine.


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: Are my ignition wires out of spec in ohms? [Re: WobblyElvis] #4440917
06/25/17 07:47 AM
06/25/17 07:47 AM
Joined: Sep 2006
Posts: 11,154
Bad Axe, MI
daman Offline
daman  Offline
Joined: Sep 2006
Posts: 11,154
Bad Axe, MI
Originally Posted By: WobblyElvis
If the engine is running fine, why would you replace them? 30,000 miles on ignition wires is nothing.

Agreed, there fine.

I have 10 year old cars with the original wires still and it runs like a champ excellent mileage.


"Always"....Mobil 1

Current fill: AFE 0w30
Re: Are my ignition wires out of spec in ohms? [Re: eljefino] #4441033
06/25/17 10:23 AM
06/25/17 10:23 AM
Joined: Mar 2014
Posts: 3,488
NJ
Leo99 Online content
Leo99  Online Content
Joined: Mar 2014
Posts: 3,488
NJ
Originally Posted By: eljefino
Rockauto will not be chinese ripoff, at least not under the Denso name. Your dealer is the real ripoff. wink

Wierd that a 2009 doesn't have coil-on-plug but Toyota is conservative at times.


My 03 and 04 Corollas are coil on plug.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4441042
06/25/17 10:36 AM
06/25/17 10:36 AM
Joined: Sep 2014
Posts: 1,491
Seattle-ish, WA
Oro_O Online content
Oro_O  Online Content
Joined: Sep 2014
Posts: 1,491
Seattle-ish, WA
The wires sound perfectly fine. 3k/ft is a very reasonable value, so unless these are 5' long they are what they should be.

He's talking about a '9_ Corolla, not an '09. The VE was a trim level back then and not since like '99 or 2000 I think. An '09 would indeed be COP ignition.

A Haynes manual is generally good for kindling or emergency TP, but not solid automotive advice. Loose that thing.

Also, the NAPA wires would likely have come with a very good warranty. I replaced some last spring from them, no hassle and w/o me having the receipt - they found my purchase from years ago in their computer with the phone number.




Re: Are my ignition wires out of spec in ohms? [Re: ziggy] #4443091
06/27/17 06:03 PM
06/27/17 06:03 PM
Joined: Mar 2016
Posts: 1,591
Toronto
PeterPolyol Offline
PeterPolyol  Offline
Joined: Mar 2016
Posts: 1,591
Toronto
Measuring ignition leads with low-voltage DC is entirely inaccurate and will tell you nothing about the condition of the wires besides being open circuit or well out of spec relative to the other wires (compensating for length obv.). Otherwise, different manufacturing techniques and types of cores can yield wildly different results on a multi-meter with neither being defective.

That said, I'd leave them.


Scambling for solutions is a hopelessly futile endeavour and potentially dangerous, without first coming to a solid, personal understanding of the problem. Beware riding the ideological hobby horse.
Re: Are my ignition wires out of spec in ohms? [Re: zrxkawboy] #4450743
07/05/17 06:53 PM
07/05/17 06:53 PM
Joined: Nov 2008
Posts: 132
FL
9050lx Offline
9050lx  Offline
Joined: Nov 2008
Posts: 132
FL
Sounds like it.
Originally Posted By: zrxkawboy
You were on the 20k setting, so your reading was 5.8k, not 5.8 ohms. I think your wires are just fine.


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