Timing mark Jumps with MSD box
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
Timing mark Jumps with MSD box
Hey guys. I'm trying to avoid spending $100 on a new timing light that is battery powered, or for a separate 12v battery to hook my t.light to so I can get a steady reading on my timing. With the MSD 6a box I have and induction sensor, my t.mark read jumps all over. I'm wondering how I can get a steady read. Thanks for any help.
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
I should get the new T. light today. It will be interesting to see where the timing is set. I always set it with zero v. advance. I don't disconnect the v. line, since it is hooked to ported and there is no v. at idle. I need to ck the weights in the distributor. It sat for about 4 months w/o use while I built the engine, etc. It is DS2. I remember the distributor guy I took it to welded one side of the advance shut, iirc. Something like that. It's been 10+ years since I looked at it. But I am lacking pep, and that is the best place to begin a search as the reason for the lacking pep.
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Post Fiend
Joined: Apr 2002
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From: Waterloo, Iowa
You're right of course, but there will be vacuum at anything above the factory idle RPM, that's why the book wants it disconnected when checking. You know this, but somebody just starting out won't. With the idle around say 650 or 700 it wouldn't be unusual to see 30° or so, it will run smooth, that's usually why people kick up the idle a bit in the first place.
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Thread Starter
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Lead Driver
Joined: Mar 2008
Posts: 7,182
Likes: 380
From: Near Los Angeles
You're right of course, but there will be vacuum at anything above the factory idle RPM, that's why the book wants it disconnected when checking. You know this, but somebody just starting out won't. With the idle around say 650 or 700 it wouldn't be unusual to see 30° or so, it will run smooth, that's usually why people kick up the idle a bit in the first place.
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