Question about Cars & Trucks
Motor turns over but there is no coil spark
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: no spark on a 1996 vw jetta
With a volt meter,check for positive 12V on the coil.
post to body metal ground when the KEY is at on position.
Check alarm for ignition and/or start cut off.
Bad relay on alarm cut off (Bosch type relay)
Posted on Dec 14, 2009
Dear Phoebejanis: If your ignition coil is hot and you can get a spark coming off of the coil wire, the only thing I can suspect would be a problem with a bad rotor in the distributor. If the coil is delivering to the distributor but it travels no further, the energy must be dissipating somewhere. If a rotor has a short, the plug wires will never be delivered any spark.
Also a distributor cap with a missing carbon button which rides on the top of the rotor may be missing. I really cant think af any other things it could be.
If I have solved your problem, please let other's know by writing in, so they will learn, not to mention the ATTABOY's I might get.
Posted on Mar 26, 2009
You can check the input voltage at each coil. This way you make sure you have the proper amount to operate. Disconnect the six ignition coil connections. Turn the ignition key on. Check the voltage at Cyl #1 B/Y wire, Cyl#2 B/U wire,Cyl #3 B/O, Cyl#4 B/G, Cyl#5 B/R, Cyl#6 B/W and ground. It should be 10.5V or higher. If not,you need to find the cause of the voltage drop.
If ok, you can test the resistance of each coil. At the coil,measure the resistance across the primary windings.It should measure between 0.50 Ohms ans 1.00 Ohms.
I hope this information is helpful.If you need anything else,don't hesitate to ask. Thanks,Chuck.
Posted on Jan 02, 2010
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I believe this engine is with interference, therefore valve damage is possible. To check if it is with interference, remove all of the spark plugs, carefully and gently, by hand, rotate over the crank, if it contacts a valve (do this carefully) well.... then you have your answer. I'd then replace the belt with proper timing and do a compression check. If a valve went bad, you know quickly.
I hope this may have helped and I we'll keep our fingers crossed for you,
Posted on Apr 15, 2010
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