1967 Transistor Ignition-No spark
I have a stock K66 TI in a L-68 427 and I only get one spark when I turn the key on or off usually followed by a loud backfire. I have no spark when I crank the starter which cranks just fine. I have 3.5V at the +coil and 8.5V at the magnetic pickup plug at the distributor . I am getting 12V through the amplifier which I replaced with one of the new modules from Lectric Ltd. I had a short in the pickup wires where they went through the distributor so I replaced the pickup coil and the Ti wiring harness. I am getting about 1V a/c when I spin the star wheel, at the pickup wires. I tried another TI coil but they both spark. Yes, I've replaced the whole system and still only the one spark when I turn the ignition switch. Any ideas on what could be wrong?
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Re: 1967 Transistor Ignition-No spark
William, I had a similar problem on a '67 L71 recently. The symptoms were almost identical, I would crank, then when the key switched to run after cranking, I'd get a slight one shot spark, a little backfire, then nothing. It was a intermittent connection on the TI Distributor pickup coil. I dissected the coil and it turned out to be a cold solder joint on a internal wire connection.
Go to member Dave Fiedlers' site at:http://www.tispecialty.com
He has a great troubleshooting guide in the Articles section. It's what helped me diagnose my problem.........http://www.tispecialty.com/articles/66-71.pdf
Rich -
Re: 1967 Transistor Ignition-No spark
always check the external ground wire on the black box for a good clean contact.Comment
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Re: 1967 Transistor Ignition-No spark
Symptoms of a bad module............Comment
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Re: 1967 Transistor Ignition-No spark
I ground down the amplifier bolt hole to bare aluminum, brushed the mounting bolts and radiator ground screw clean. I'm getting a good ground to all three bolts on the amplifier. I'm still only getting a spark when the ignition switch is turned on or off. I ran Dave Fiedler's trouble diagnosis procedure and it looks like another faulty amplifier unit as I'm getting 615 ohms from the magnetic pickup leads and infinite when I ground each lead. I'll be in touch with Lectric Ltd tomorrow. Thanks for the help and I'll let you know the outcome.Comment
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Re: 1967 Transistor Ignition-No spark
William, FYI, there is a alternative supplier of the TI module. You may want to call Dave Fiedler and ask his opinion. He is a great guy to talk to.
Rich
p.s. I used the "other" supplier and am very pleased.Comment
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Re: 1967 Transistor Ignition-No spark
Well I finally solved the problem with the help of a local shop. When I pulled the distributor to replace the pickup coil I installed the distributor gear on the shaft upside down and the distributor was not turning. I'll bet I wasn't the first person to do that but I still feel stupid. Thanks for everyones help.Comment
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Re: 1967 Transistor Ignition-No spark
William,
I will go look at a distributor, I did not know that was possible to install upside down and get the pin through.
Are you refering to installing the driven gear 180* from the correct position.Comment
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Re: 1967 Transistor Ignition-No spark
The distributor drive gear was installed upside down causing it to not mesh with the cam gear and the distributor was not turning according to the mechanic I finally took it to. The distributor gear must have slid below the cam gear because I felt the distributor shaft turn as the gears met. I was so sure it was an electrical problem that I didn't even check to make sure that the distributor was turning. The car starts and runs great now with the new pickup coil. Live and learn.Comment
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