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  #16 (permalink)  
Old 02-22-2012, 03:22 PM
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Quote:
Originally Posted by spiffy61
Ok, finally got a new module in and took a bunch of readings with a quality FLUKE meter. These were taken at the distributor. This is an HEI dist in a 350sb 1981 chevy C10.

12.0 V dc not running.
9.5 V dc starting.
13.6 V dc idling.
14.3 V dc @ 50 mph.
.5 VAC @ 50 mph
4KHz @ 50 mph.
------------------------
1.6 Amps dc @ idle
2.6 Amps dc @ 50 mph

The alternator has an internal regulator. The only things i found by the fuse box where the horn relay and a stupid looking thing which i found out was a seat belt buzzer (which I put in the circular file)!
4khz @ 50 mph. Please explain where you got this reading.
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Old 02-22-2012, 08:01 PM
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I got that reading when I was checking the DC and AC volts. There is a Hz selection in between the other two on the meter. I assume its just the RF thats generated. How does the other readings look?
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Old 02-26-2012, 02:24 PM
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Just wondering if short spark plugs could take out the module prematurely? I have to use short ones becuz of the headers........
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Old 02-26-2012, 02:29 PM
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Quote:
Originally Posted by spiffy61
I got that reading when I was checking the DC and AC volts. There is a Hz selection in between the other two on the meter. I assume its just the RF thats generated. How does the other readings look?
There should not be any A/C voltage on the power lines. Where did you take this reading.
if you took it at the distributor it may just be a little feedback.

if you really do have A/C leakage from the alternator it can hurt electronics and could be the source of your issue
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Old 02-26-2012, 02:31 PM
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Quote:
Originally Posted by spiffy61
Just wondering if short spark plugs could take out the module prematurely? I have to use short ones becuz of the headers........
No, they are on the secondary side of the system and should have no effect.
Is the feed for your distributor anywhere near a plug wire?
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Old 03-11-2012, 01:13 PM
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I had an 86 GMC that fried a couple of modules, when I replaced the pick-up coil and the module it fixed the problem.
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