rodolfonder Posted March 30 Report Share Posted March 30 Hello, I have a 74' 260Z. After my issue started, I replaced the starter, the battery, and the ignition switch. Looking back, I noticed the car had trouble starting for a while before it got bad. The last few times I tried to start it, when I turned the key all the way to crank the engine, I would lose all electrical power. After a couple attempts, the electrical would eventually come back and the car would try to turn over. This happened about three different times, but each time I was able to get it to crank eventually. The most recent time, I got it into the garage and that was the final straw. Now, every time I try to turn the engine over, I lose all electrical again. To get power back, I either have to disconnect and reconnect the battery, or sometimes I just have to wait awhile and the electrical comes back on its own. This is my first classic car, so I’m still learning, and I haven’t been able to find any information that matches what I’m seeing. Any ideas on what might be causing it? Quote Link to comment
Bleach Posted March 30 Report Share Posted March 30 When you say you replaced the ignition switch, was it the plug that goes onto the back of the key cylinder? Quote Link to comment
datzenmike Posted March 30 Report Share Posted March 30 Throwing parts at a problem is never a good idea. At best its a guess, usually wrong, (and it gets expensive) at worst you replaced a perfectly good part with a typically inferior quality one. Best is to trouble shoot the problem and like a detective eliminate the suspects. 1/ Clean and tighten battery posts and clamps. Now check the other ends, the ground on the front of the head and the connection of the positive cable on the starter solenoid. If a battery clamp looks bad, it is, so replace. 2/ Check the fusible links. They are a source of problems on the Z car... 3/ Get a volt meter and pull the small start signal wire from the starter solenoid and read the voltage from the ignition key in the START position. Long runs, old connections at harness plugs and small diameter wire can lower the start signal voltage and cause the solenoid to not work. It's a relatively easy fix after proving there is a voltage drop... 1 Quote Link to comment
rodolfonder Posted March 31 Author Report Share Posted March 31 17 hours ago, Bleach said: When you say you replaced the ignition switch, was it the plug that goes onto the back of the key cylinder? Yes, I replaced the ignition switch with the wiring plug on the back. Quote Link to comment
datzenmike Posted March 31 Report Share Posted March 31 If replaced and it didn't help then probably not the cause. Hope you kept the old one. Get a test lamp or meter. Quote Link to comment
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