 Bosch Blue Coil Issues |
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| kpfoten |
 Dec 13 2009, 04:20 PM
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#1
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Member  Group: Members Posts: 220 Joined: 15-April 08 From: Escanaba, MI Member No.: 8,927 Region Association: None  |
Hello-- I replaced my coil a few months ago--it was no good. The new one worked until just tonight when the car died in the driveway. I am getting no spark, no reading from my timing light hooked to the coil-dizzy. My test numbers: 3.1 ohms + to - and 12.07 kohms from either to center post (this is lower than the 15-30 kohms that is the range of normal in my vw book). Key on, I get around 11.9v or so to positive terminal on the coil. Is the coil bad? Are there things that can cause the coil to fry? Confused. |
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| jmill |
Dec 13 2009, 04:34 PM
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#2
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Green Hornet Group: Members Posts: 2,449 Joined: 9-May 08 From: Racine, Wisconsin Member No.: 9,038 Region Association: Upper MidWest |
Wikipedia explains things better than I can: The points allow the coil to charge magnetically and then, when they are opened by a cam arrangement, the magnetic field collapses and a large (20 kV or greater) voltage is produced. The capacitor is used to absorb the back EMF from the magnetic field in the coil to minimize point contact burning and maximize point life.
I would change the points and condensor first. |
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Posts in this topic
kpfoten Bosch Blue Coil Issues Dec 13 2009, 04:20 PM
ME733 :popcorn: ...No Spark at all......SEE IF THE POINT... Dec 13 2009, 04:31 PM kpfoten Oops... I should've mentioned that I recently ... Dec 13 2009, 04:54 PM ME733 :popcorn: ... Nope!...the hot spark module , w... Dec 13 2009, 05:05 PM kpfoten I thing the hot-spark module is burnt out. I ran r... Dec 13 2009, 05:21 PM jmill They have a 3 year warranty. Turn that puppy in f... Dec 13 2009, 07:36 PM kpfoten Yep! Sending it back tomorrow. I'm wonderi... Dec 13 2009, 07:43 PM Racer Chris If its anything like a Pertronix, they will fail i... Dec 13 2009, 08:09 PM kpfoten Yeah, I definitely didn't keep the ignition on... Dec 13 2009, 09:17 PM
Scott Schroeder
I'd put points back in but my braided ground-... Dec 13 2009, 09:24 PM kpfoten Dang--no kidding! Somebody told me it wouldn... Dec 13 2009, 09:30 PM Johny Blackstain I've heard several horror stories regarding fr... Dec 14 2009, 09:34 AM |
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