If you have 12v there, then manually open the points and check for spark from the coil. If no spark, remove the wire from the points and manually “spark” it to ground. If spark, then problem is bad points or condensor. If no spark, then the problem is coil or the wire to the points.Click to see full answer. Herein, what can cause no spark?Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.Beside above, can a bad condenser cause weak spark? Weak spark is often the result of a bad condenser (and it’s a cheap part to replace). If you see higher resistance here, then you need to clean and check the connections and the circuit path to ground through the points. Also check resistance between the distributor body and the engine block. Thereof, how do I fix no spark? If you do not see a spark, there is an ignition problem. Remove a plug wire and insert an old spark plug or a spark plug tester into the end of the wire (the plug boot). Place the spark plug on a metal surface on the engine, or ground the spark plug tester to the engine. Then crank the engine to check for a spark.Can a bad ground cause no spark?backfiring through the intake is pretty much always firing order is wrong. Bad grounds can cause no spark issues though. It can cause the ground to ground through the ecu frying it. If you get a single spark when turning on the ignition then nothing when cranking it’s the ecu.
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