How can you tell if there is no spark in a spark plug?
You’re pretty sure there is no spark but how do you determine what the exact cause is? Definitely do a test for spark at the plugs. Remove one of the plug wires from a plug and hold it near grounded metal. (If the plug end has a long insulated shroud, you may have to improvise to get ground close enough to the end of the wire.)
Why is my no spark tester not turning on?
If the tester stays OFF while cranking, there are 3 possibilities: Points shorted (stuck closed). Condensor shorted. Coil open. Take the Green points wire off the coil terminal. If the tester now goes ON , either the points or the condensor is shorted. Replace both. If removing the Green wire still did not turn the tester ON , the coil may be open.
What causes a car engine to have no spark?
A Bad Rotor Or Distributor Cap (cracks or carbon tracks that are allowing the spark to short to ground). Often the distributor cap is suspect. The internal and external surface of the cap should be clean. No erosion should be on the surface and the firing points should be free of rust or corrosion. Also, Confirm the rotor is in good working order.
Why are the points on my spark plug not closing?
If the tester stays ON while cranking, the points are not closing. Watch them while turning the pulley to see if they appear to close. If they do, there may be a surface film on the points or the points are eroded and pitted. Replace the points. I strongly recommend using Bosch points as many of the off-brand points give very poor life.
Why is there no spark in my ignition?
An ignition module requires some type of external input in order to activate. If your vehicle stalls unexpectedly during operation and will not start again, it is likely because of loose or corroded electrical connections in the ignition module. In this case, check the switch, clean oxidized terminals, and replace broken wires if necessary.
What to do when your engine has no spark?
Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. Finally, Have someone crank the engine and watch for spark. Remove one of the coils from the spark plug. Use an extra spark plug. A spark plug tester. Or even a screwdriver in the end of the coil.
What does it mean when there is no spark on a VW?
If it doesn’t, there is no power from the Ignition Switch. Track that down (bad switch?). Incidentally, VW neverput any fuses in the Ignition circuit; so don’t go looking for blown fuses. Double check that there is power at Terminal #15 while cranking the engine with the key.