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Author
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Topic: How to test ign. coil?
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gercolla1
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Member # 3068
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posted
 
 
This other car wont start.How can the coil be bench tested for overall performance.Can a coil be working just a little bit,or is an all or nothing type device? ![[burnout]](graemlins/burnout.gif)
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Sf Bay Area
Posts: 2171 | From: Sampan San Francisco | Registered: Jul 2003
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2stangs69-91
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Member # 1951
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posted
Yes it can be working just a little causing big problems. there is a ohms test for coils. You check between the primary + and - conections and then from the secondary to the primary. There are spacs for each coil made. I don't have a book in front of me with specs right now.
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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Blind
2.3L
CAFords OG
Member # 3052
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posted
its so easy to plug another one in that I've never bothered testing one.
coil died on my truck last year and it still had spark, started swapping parts and when I swapped the coil it fired right up.
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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JohnB
Tech Moderator
Member # 969
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posted
Firmly grab the top of the coil with your index finger and thumb. Now grab a good ground. Have a buddy turn the car over. If you begin to cry after the 3rd revolution of the engine, the coil is good. ![[Big Grin]](biggrin.gif)
The coil should ohm somewhere between .50 -.65
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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nitrous_bob
CAFords OG
Member # 77
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posted
quote:
Originally posted by JohnB:
Firmly grab the top of the coil with your index finger and thumb. Now grab a good ground. Have a buddy turn the car over. If you begin to cry after the 3rd revolution of the engine, the coil is good.
The coil should ohm somewhere between .50 -.65
sorry but i disagree....the coil might be fine, and you might not ever cry, just turn all your hair curly.
or start to smoke...either way it's a harsh test...have your GF or wife hold the coil, and you turn the car over, thats what i do
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5.0 OG since 1990
Posts: 1402 | From: st clair shores MI | Registered: Nov 2000
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migs66/92
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Member # 4811
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posted
Originally posted by JohnB:
Firmly grab the top of the coil with your index finger and thumb. Now grab a good ground. Have a buddy turn the car over. If you begin to cry after the 3rd revolution of the engine, the coil is good.
The coil should ohm somewhere between .50 -.65
sorry but i disagree....the coil might be fine, and you might not ever cry, just turn all your hair curly.
or start to smoke...either way it's a harsh test...have your GF or wife hold the coil, and you turn the car over, thats what i do
I like his idea ![[Smile]](smile.gif)
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Ill keep my guns and my money, you can have the change
Posts: 343 | From: lodi ,cal | Registered: Aug 2004
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