Megatherion Posted September 24, 2009 Share Posted September 24, 2009 I have a '78 280z with a weird problem, sometimes the car runs normally but suddently dies and when I try to re-start the engine again the spark dissapears, then the spark is there again and the engine is able to start, and then it happens again and again, no spark and I can't find where the problem is taking place, I already have changed the coil, wires, spark plugs, rotor and cap and nothing seems to work, but also I have notice something, when I check the negative and positive wires that connect the coil, both positive and negative have a 12v electrical current. I don't know if this may be normal, I will appreciate any help, thanks. Quote Link to comment Share on other sites More sharing options...
KillerBjt Posted September 24, 2009 Share Posted September 24, 2009 I would say check the wiring and make sure its not shorting anywhere and check to make sure the all the grounds around the engine bay are clean good ground. Quote Link to comment Share on other sites More sharing options...
e_racer1999 Posted September 24, 2009 Share Posted September 24, 2009 Could be an ignition switch issue. And yes, both "+" and "-" on the coil should be testing as "+" when hooked to the ground. The "+" and "-" are relative. When we were wiring up the race car we noticed that the wire for starting ignition power was separate from running ignition power. Testing the ignition switch is pretty easy with a multimeter. If all else fails, it's at least worth checking. Quote Link to comment Share on other sites More sharing options...
Megatherion Posted September 25, 2009 Author Share Posted September 25, 2009 Thank you guys, I'll check everything tomorrow. Quote Link to comment Share on other sites More sharing options...
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