RE: [DMCForum] Re: Shakedown Breakdown (More ignition troubleshooting)

["Dave Stragand" <dave.stragand@xxxxxxxxxxxxxxx>]

Actually, it should be a bit low.  That is the purpose of the resistor.
These coils actually run about 6 volts, not 12, and need the resistor to cut
it down or hey run scalding hot, and thus higher resistance and cooler
spark.

-----Original Message-----
From: cruznmd [mailto:racuti1@xxxxxxxxxxxx] 
Sent: Monday, August 02, 2004 9:39 AM
To: DMCForum@xxxxxxxxxxxxxxx
Subject: [DMCForum] Re: Shakedown Breakdown (More ignition troubleshooting)


Good question. I have not measured it within the last few days, but 
the last time I measured it, it was around 7 or 8 volts, which I know 
is a bit low.

The one thing I don't want to hear, is that this is a pulse coil 
problem. The dizzy is a pain in the ass to get at, and I have never 
taken a Bosch dizzy apart. I don't think that's the problem though 
becuase it's usually a "die, cool down, work, die again" symptom.

Rich A.

--- In DMCForum@xxxxxxxxxxxxxxx, "Dave Stragand" <dave.stragand@xxxx> 
wrote:
> What is the -voltage- at the coil?
> 
> -----Original Message-----
> From: cruznmd [mailto:racuti1@xxxx] 
> Sent: Sunday, August 01, 2004 9:35 PM
> To: DMCForum@xxxxxxxxxxxxxxx
> Subject: [DMCForum] Shakedown Breakdown (More ignition 
troubleshooting)
> 
> 
> After advancing the timing back to 13 degrees, there was definitely 
> an improvement in performance, but still some small bit of the 
> problem remains. I was even able to run the new coil with better 
> results, but still the old, blue coil works better.
> 
> Two things of note: 
> 1. When the ballast resistor has been powered for a while and it's 
> good and hot, the resistance increases. The lower one read .9 ohms 
> and the upper one read .7-.8 ohms. This is nearly double the rated 
> value. I think it's breaking down and should be replaced.
> 
> 2. With my shiny, new timing light, I was able to observe the 
> different types of timing advance;
> 
> In accordance w/the manual, under vacuum advance, it has 3 steps 
and 
> the timing incremented accordingly. I then removed the vacuum line 
> from the distributor and checked the centrifugal advance. It 
> increments to the proper points at the proper RPM's as far as I can 
> tell. It's hard to see the tach and read the timing at the same 
time.
> 
> Under load, it's a different story. The car hesitates a bit when 
you 
> pull away, as though the advance is sticking and when it "breaks 
> free", acceleration is smooth and steady.
> 
> Does this sound cracked or is it feasible?
> 
> Rich A.
> #5335
> 
> 
> 
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