RE: [DML] Ignition bits' values
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RE: [DML] Ignition bits' values


Joe Kuchan

To: dmcnews@xxxxxxxxxxxxxxx
From: tgraham@xxxxxxxxxxx
Date: Tue, 13 Jan 2009 11:02:26 -0600
Subject: [DML] Ignition bits' values

            I've been diagnosing a problem with my driver car and in that process, measured the following electrical values.  These were all taken when everything was cold:

Ignition resistor:

Book says: 0.5 ohm on both leads

My car: 0.7 ohm on both leads

Ignition coil (battery-distributor terminals):

Book says: 1 ohm

My car: 0.6 ohm

Ignition coil (output to a side)

Book says: 7000 ohm

My car: 8930 ohm

Distributor impulse coil:

Book says: 1000 ohm

My car: 630 ohm (and the coil lead-to-housing was an open circuit as  it should be)

Obviously my values don't match what the shop manual says, but the  manual also says its values are high for some of those.  I'm curious  if these values are normal.  I have another car handy and tested  against that one and got similar readings.  Ordinarily I'd say that  the odds of one of those parts being bad is significantly diminished  since I tested two cars with near-identical results... but we are  talking about 29-year-old parts and I wouldn't say that the other car is an ideal control sample.  Does anything there look out of whack?   

Otherwise it's on to the fuel system...



#6344, #3281


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