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Old 11-05-2003, 05:47 PM
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I am loosing my mind!!

i wrote earlier about my car having trouble getting spark at high rpms, well earlier i thought i found the problem with my cap not tightened down but.. It still does it.. I dont know what to do anymore i have replaced everything.. At high rpms my car has no spark. I am checking it with a timing light. when i pull the spark plug wire off i get plenty of spark when i connect it nothing. the car still runs smooth at high rpms but, well my timing light tells me that i have no spark. y.. It is driving me crazy, especially when almost all my wires are doing that.. What could be wrong. If any one has any ideas please write me cause i am out and i am loosing my mind over this. Thank you ..

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Old 11-05-2003, 05:55 PM
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At high rpms my car has no spark. I am checking it with a timing light. when i pull the spark plug wire off i get plenty of spark when i connect it nothing. the car still runs smooth at high rpms but, well my timing light tells me that i have no spark
Maybe the timing light is shutting down after a certain RPM. You say it runs smooth at higher RPM's but the light says you have no spark. I would put my money on the light not registering.

Kevin
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Old 11-05-2003, 05:59 PM
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But if the timing light is not responding at high rpms then how come when i pull the spark plug wire off the spark plug the timing light lights up like a sparkler??
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Old 11-05-2003, 06:05 PM
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If the engine is running at hi RPM, it HAS spark. An engine wont run without spark. Do you mean you have a miss at high RPM?

If you have a miss, it won't run smoothly.

Its your light....case closed.
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Old 11-05-2003, 06:24 PM
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what do you mean by case closed? Its a brand new timing light about 3 months old i bought it through napa.

If any one has ever heard of somthing like this please tell me..

Last edited by CurtisL; 11-05-2003 at 06:24 PM.
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Old 11-05-2003, 07:39 PM
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If your engine is running, you are getting spark.........whether you light says so or not................
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Old 11-05-2003, 08:31 PM
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Did you read anything about the light? How high of an RPM are you taking it to when the light says you have no spark? Probably when you pull the plug wire off the current is going directly to the light. Also when you pull the wire the engine should develop a miss. Are you sure it is running smooth when you increase the RPM's and the light stops. If so, it is the light itself that may be faulty. If you didn't have spark the engine will die or miss something terrible.

Kevin
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Old 11-05-2003, 08:33 PM
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Try a different timing light! I bet it doesn't happen.

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Old 11-05-2003, 09:59 PM
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thank you everyone

Thank you everyone for your response. I guess i was just worried to much about that. When i pulled the wire off the plug the car did develop a miss and when i put it back on it went away. I guess my timing light is well just not good enough to read signals at such a high rpm.. My tachometer was messed up and i think it must have been around 4500 rpms when i tried it. I guess it just took everyone to remind me that if the ignition wasnt working right then the motor would miss. Thank you very much.

Thank you everyone for your response. I guess i was just worried to much about that. When i pulled the wire off the plug the car did develop a miss and when i put it back on it went away. I guess my timing light is well just not good enough to read signals at such a high rpm.. My tachometer was messed up and i think it must have been around 4500 rpms when i tried it. I guess it just took everyone to remind me that if the ignition wasnt working right then the motor would miss. Thank you very much.

Last edited by CurtisL; 11-05-2003 at 09:59 PM.
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Old 11-06-2003, 03:36 PM
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i hadda similar problem once and ended up replacing my modulator on my uni-lite. the problem was my coil wire conductor was burnt in half inside the insulation and i couldnt see it till i actually pulled it and it came apart in the middle. really weird.
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