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Discussion Topic:
no spark crab...mystery
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MICHV8 |
07-23-2020 @ 2:54 PM
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Member
Posts: 448
Joined: Jul 2010
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I have a crab distributor that won’t create a spark on car A. The car ran in the spring. In order to isolate the problem, I’ve done the following: I have used another crab distributor from running car B and car A starts. So car A ignition coil is not the problem. I have put the condenser from car A on running car B and car B starts. So car A condenser is not the problem. I put car A rotor on running car B and car B starts. So the rotor is not the problem. Car A points are the typical Chinese junk, but are new. I have tried timing the distributor (wide side shank 3/8 from vacuum hole) a dozen times with no luck. I have looked for any inadvertent shorts and see none…Any ideas?
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cliftford |
07-23-2020 @ 4:11 PM
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Senior
Posts: 845
Joined: Jan 2014
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it sounds like you have narrowed it down to the points on car A, defective, gap, setting, or not installed correctly.
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TomO |
07-24-2020 @ 7:11 AM
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Senior
Posts: 7256
Joined: Oct 2009
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Check the point resistance for continuity. Check the coil input voltage as you tap the starter to open and close the points. Open points should read battery voltage, closed points should read less than 4 volts and more than 2 volts.
Tom
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supereal |
07-25-2020 @ 11:50 AM
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Senior
Posts: 6819
Joined: Oct 2009
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Check the inside of the cap and the rotor. The crab distributor takes these parts special to that distributor. Installing the regular rotor will cause interference with the inside cap contacts, breaking the rotor shank, and damaging the cap contacts.
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