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#4799425 - 06/28/18 07:00 AM coil/spark plug tester
andyd Offline


Registered: 09/25/04
Posts: 7297
Loc: Marshfield , MA
Did some googling, they're fairly cheap < 15$. Mixed reviews on mostly Chinese stuff. It will be a dedicated OPE tool. Any recommendations? My close vision is bad, seeing a spark whilst grounding and pulling the engine over is hard. TIA
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1994 Ranger ,the Rat, 5w30 dino, STP filter

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#4799442 - 06/28/18 07:38 AM Re: coil/spark plug tester [Re: andyd]
rollinpete Offline


Registered: 03/20/17
Posts: 501
Loc: West Ma.
I've had good luck with one of these
Just hold it to the spark plug wire.

click here
_________________________
Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
Penn. Plat. HM. 5w30
Fram xg8a, Fram CA8141

I like my oil (slippery).


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#4799461 - 06/28/18 08:13 AM Re: coil/spark plug tester [Re: andyd]
spackard Offline


Registered: 03/24/11
Posts: 1757
Loc: CA
If you can also hold the probe close to the plug wire with one hand, then I have an old GB Instruments non-contact voltage detector that I use to check for spark at the plug wire.
It has a red LED and an audible beeper that light and make noise when the spark fires.
https://goo.gl/images/XCvJ7o
Probably not made anymore. You have to squeeze the pocket clip continuously in order to provide voltage to its circuit.

I'm sure there are other makes that have an audible beeper. Hioki makes a nice one.
The visual and audible indicators help.

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#4799492 - 06/28/18 08:50 AM Re: coil/spark plug tester [Re: andyd]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 12037
Loc: N.H, U.S.A.
If you get a small fluorescent "flashlight" bulb at the dime store, they will light up as the spark moves through a carbon core or metal coil high tension wire.
v
I used this on my old 90's Silverado 4.3 six-er that was prone to misfire with its outdated iggy system and WAY too much advance** at low rpm light load.

** enough advance that the spark would fire on the previous terminal. I cut I open a window in the dist cap and witnessed this. Recall theses engines used a small cap dist.

The above only works well in low light situations.
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#4799659 - 06/28/18 11:36 AM Re: coil/spark plug tester [Re: rollinpete]
Dave1027 Offline


Registered: 05/02/18
Posts: 63
Loc: California
Originally Posted By: rollinpete
I've had good luck with one of these
Just hold it to the spark plug wire.

click here


Most engines these days don't have spark plug wires and the plugs are deep between dual overhead cams. Can that device work with coil on plug type ignitions?

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#4799693 - 06/28/18 12:19 PM Re: coil/spark plug tester [Re: Dave1027]
rollinpete Offline


Registered: 03/20/17
Posts: 501
Loc: West Ma.
Originally Posted By: Dave1027
Originally Posted By: rollinpete
I've had good luck with one of these
Just hold it to the spark plug wire.

click here


Most engines these days don't have spark plug wires and the plugs are deep between dual overhead cams. Can that device work with coil on plug type ignitions?


Good question, not sure, never tried it on a coil on plug boot.
_________________________
Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive183k miles
Last Change;
Penn. Plat. HM. 5w30
Fram xg8a, Fram CA8141

I like my oil (slippery).


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#4801009 - 06/29/18 11:04 PM Re: coil/spark plug tester [Re: andyd]
red7404 Offline


Registered: 01/24/18
Posts: 207
Loc: KS
in the late 60s Champion had a pen with a neon bulb in it. if you held the metal end and the other metal end had big grove to fit the plug wire. it would light if the plug was firing. very cool. i bet a cleaver guy could make one.


Edited by red7404 (06/29/18 11:05 PM)

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#4802398 - 07/01/18 02:12 PM Re: coil/spark plug tester [Re: andyd]
bunnspecial Offline


Registered: 11/23/15
Posts: 784
Loc: US
I use a timing light as a spark tester...although that's overkill for just looking for a spark. I use it because it's a tool I always have handy and if I'm looking for a spark in the first place I'm probably going to need to use the light for its intended use soon.
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1970 MG MGB Roadster-Valvoline VR-1 20W-50

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#4803190 - 07/02/18 01:28 PM Re: coil/spark plug tester [Re: rollinpete]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 12037
Loc: N.H, U.S.A.
Originally Posted By: rollinpete
Originally Posted By: Dave1027
Originally Posted By: rollinpete
I've had good luck with one of these
Just hold it to the spark plug wire.

click here


Most engines these days don't have spark plug wires and the plugs are deep between dual overhead cams. Can that device work with coil on plug type ignitions?


Good question, not sure, never tried it on a coil on plug boot.
You have OBDII that will tell you if you have a misfire and it will pinpoint the cyl. ON BOARD DIAGNOSTICS. all you need is a cheap code reader or better still, a Phone Dongle. This ain't 1968 or 1978.
_________________________
2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter

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#4805301 - 07/04/18 08:11 PM Re: coil/spark plug tester [Re: andyd]
Mitch Offline


Registered: 08/20/03
Posts: 127
Loc: So. Cal
I use a laser targeted infrared gun, less that $25 at harbor freight. If it aint firing, it is cooler

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