Engine start up, Problem 3: Weak Starter |
|
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. |
|
Engine start up, Problem 3: Weak Starter |
OU8AVW |
Dec 17 2014, 11:44 AM
Post
#1
|
Yacht Rigger Group: Members Posts: 1,803 Joined: 1-October 08 From: Granbury, TX Member No.: 9,601 Region Association: Southwest Region |
I'm working through starting my freshly rebuilt 2056. It has the original D-Jet and is a 1975 motor. At first I had no fuel pump, I fixed that.
Now there is no spark from the coil. I traced the lead from #8 on the fuse box to the relay board then out the relay board. I have 12.4v at the coil positive but no spark. I'm testing it with a light-type tester. No bueno.... It is a Bosch coil, i believe it is a "blue" coil. I read here that there should be 1.5 ohms resistance between the two poles on the coil with everything dissconnected. This one tests at 7.4 ohms. A spare coil I had had similar results with no spark at crank and 4.6 ohms resistance. I assume i need a new coil...... Right? |
Cap'n Krusty |
Dec 17 2014, 12:36 PM
Post
#2
|
Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
"New coil"? Hardly EVER. Look at the wiring to the negative side of the coil, look at the points and the points plate ground strap. If you have a points replacement unit, such as a Pertronix, it may have gone bad (generally from operator error, but they also just quit). You can easily test the coil by removing the points wire and the tach wire off the (-) side of the coil and momentarily ground, then unground, the terminal, which will cause the coil to fire. (See the above post.)
The Cap'n |
Lo-Fi Version | Time is now: 24th September 2024 - 12:56 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |