74 2.0 F.I. NO spark, Ran before new battery |
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74 2.0 F.I. NO spark, Ran before new battery |
Nemisus |
May 17 2015, 02:14 PM
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#1
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Member Group: Members Posts: 82 Joined: 1-October 11 From: North Bay CA Member No.: 13,631 Region Association: Northern California |
So I am stumped. When I took delivery of my newly acquired 74 914 the car would start up just fine with a jump box.
I went out and bought a new battery and now I have no spark... at lest from I can tell doing the simple spark tests I have done. I just did an Ohms test on my Ignition coil and here is what I got Primary: 1.4 Secondary: 10.41 Per the Pelican Technical Article I should see readings like this: primary coil winding's should give a reading of 0.3-0.6 ohms. Secondary coils should be near 600 ohms. If I understand my results I am significantly higher than where I should be? But does that mean my coil is is the cause of no spark. The only thing I changed was a busted fuel line and put in a new battery... Now the car will not start. Any ideas on where else to look? Thanks in advance Cheers Nem |
Dave_Darling |
May 17 2015, 08:55 PM
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#2
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914 Idiot Group: Members Posts: 14,991 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California |
The 914 does not have a CD ignition which would whine when the power was on. Most 911s do, and the 914-6, but not the four-cylinder cars.
The hot coil is likely because your points were closed, running current through the coil while the key was on. Here's a test: Unplug the (-) wires from the coil. Hook a spark plug wire with a plug attached to the coil center terminal. Tape the plug so the outer electrodes or the threaded part is grounded. Now hook a wire to ground, touch the wire to the coil (-) terminal, then pull it away. You should get a spark from the plug. If you do, the coil is working the way it should. --DD |
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