Black and yellow wire that comes out the igniter box, with power on the box, its live. What is its purpose ?
The Yellow and red wire is the power IN to feed the ignition module, this is the ON/OFF connection to the ignition/kill switch. Q: Old faithful has weak spark, and rough running below 3000 rpm – after that, the motor appears to come together, and runs smoother. It does not appear to be carbs, as the plugs burn tan if I can keep her above 3000 rpm. I have replaced the coils, soldered the connectors, cleaned the carbs etc. Thought it to be the timing advancer which is sticky, but she is an 81′ A3 model without the mechanical advance mechanism. The only other suspect might be the igniter – how do I know if this is ready for the scrap heap – can I test this some how? A: The best test for the Igniter is to put a timing light on cylinder 1&6 and check to see if the timing advances as the RPM are increased to about 3000-3200 RPM as it should. If it doesn’t advance or it is ‘stuck advanced’ the box is no good, but these 81′ igniters are very difficult to find and very expensive usually when yo
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