 Coil Issue, Why did my coil bite the dust? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| PDXBob |
 Sep 7 2026, 03:34 PM
Post
#1
|
|
Member  Group: Members Posts: 65 Joined: 16-May 20 From: Portland Oregon Member No.: 24,272 Region Association: Pacific Northwest 
 |
Hi 914ers,
So last week I had a new experience. Last Friday I was on my way home in my 914 (1975, 1.8 L, with original FI) and it died and wouldn’t restart. First time in 6 years that it’s left me stranded! Towed home. Last weekend I worked on it and determined it was an electrical issue. I was getting no spark from coil. Replaced the coil and now it runs fine. I don’t think the old coil was more than 2-3 years old. I have a 123Ignition electronic distributor, I installed about 2 years ago, so no points, condenser, etc. Sparks plugs are not very old, and look good. So, my question is: what causes a coil to go bad? Is it the engine heat off of a 914? Any guesses? Thanks for your help. PDXBob |
   |
 
|
  |
Replies
| L-Jet914 |
Sep 8 2026, 12:06 AM
Post
#2
|
|
Member Group: Members Posts: 422 Joined: 24-October 12 From: Davis, CA Member No.: 15,080 Region Association: Northern California |
QUOTE(jim_hoyland @ Sep 7 2026, 05:32 PM)  ? What are the parameters for a “good” coil. I have a spare I’d like to bench test. Typical resistance values for the primary circuit 0.3 to 3ohms and the secondary circuit 5000-20000ohms. |
|
|
|
Posts in this topic
PDXBob Coil Issue Sep 7 2026, 03:34 PM
emerygt350
Hi 914ers,
So last week I had a new experience. ... Sep 7 2026, 04:51 PM wonkipop coils ain't what they used to be.
along with ... Sep 7 2026, 05:17 PM Shivers Old age, poor manufacturing, excessive heat, vibra... Sep 7 2026, 05:38 PM PDXBob Here is picture of old coil. No name on it. Yes, c... Sep 7 2026, 06:16 PM emerygt350 Check the resistance across the secondary and prim... Sep 7 2026, 06:27 PM jim_hoyland ? What are the parameters for a “good” coil.
I... Sep 7 2026, 06:32 PM
emerygt350 On our cars you should see 3-4 ohms on the primary... Sep 8 2026, 04:45 AM |
4 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
2 Members: 73-914, Front yard mechanic
|
Lo-Fi Version | Time is now: 8th September 2026 - 08:46 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.