 Weak spark with Mallory CDI, not sure if it's the wires or plugs?? |
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| Mueller |
 May 27 2005, 12:14 AM
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#1
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914 Freak!  Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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anyone else run into this?
got to find all my manuals to figure out if I should be running wires with X amount of resistance or special spark plugs..... |
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| lapuwali |
May 27 2005, 12:17 AM
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#2
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
Tried it w/o the CDI? You using the Link to fire it? Can it fire the coil w/o it?
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| Mueller |
May 27 2005, 12:24 AM
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#3
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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spark appears to be the same with the Link as without it....of course this was just testing with plug out and sitting on top of a ground......very, very weak spark...removed plug, huge spark (which I expected due to less resistance) I have not tested the spark from the coil without the CDI. that'll have to wait till Sat. |
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| Dr. Roger |
May 27 2005, 12:55 AM
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#4
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
CDI's on a bike can break down in the windings causing an internal short. It usually starts out be getting a weaker and weaker spark.
they're usually very durable. i'd try to find someone and borrow their coils to find out quickly if yours are bad. or not. i'm not usually a parts changer but it's sometimes difficult to test these coils due to the amount of voltage going thru them and getting a real ohm-age weather their good or not. how do you know it's a weak spark under compression? do you have a scope? |
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| Mueller |
May 27 2005, 11:06 AM
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#5
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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Roger,
CDI and coil are brand new, never used units......I have not pulled the plugs yet, they might be fouled or something, I do know that I was getting plenty of fuel when cranking the engine but just no firing of the plugs...my timing could be way off still, I figured I should get at least a "pop" (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) time to hook up a remote start button, the wife is not happy being the ignition grunt (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) I do have another brand new coil that I can try out and I'll test the spark without the CDI control........ |
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