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Spark plugs, misfires, and general ignition system

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FSJunkie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FSJunkie Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2023 at 1:09am
Well, if it's an engine out of a 1969 then it's not a 195.6, but a 199 or a 232. Those are completely different engines.

Anything from 5* to 10* BTDC at 500 RPM with the vacuum hose disconnected will make a 199 or 232 idle happily. 

Setting the timing with the hose connected or with the engine idling faster than 600 RPM will cause you problems. 

1955 Packard
1966 Marlin
1972 Wagoneer
1973 Ambassador
1977 Hornet
1982 Concord D/L
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mtrosclair Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2023 at 7:27am
Originally posted by FSJunkie FSJunkie wrote:

Well, if it's an engine out of a 1969 then it's not a 195.6, but a 199 or a 232. Those are completely different engines.

Anything from 5* to 10* BTDC at 500 RPM with the vacuum hose disconnected will make a 199 or 232 idle happily. 

Setting the timing with the hose connected or with the engine idling faster than 600 RPM will cause you problems. 


Correct, it is a 199 with about 450 miles since rebuild.  
1963 Rambler Classic 550
Originally a 196, this one has a 199 from a 69 American.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mtrosclair Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2023 at 10:17am
I have fiddled with this thing all morning, but I just cannot get it to like a 500 RPM idle. 600 RPMs it seems to be completely OK with it. I’ve got it pretty smooth, but dropping down to 500 it’s lumpy and it’s makes noise like it’s trying to die.  
1963 Rambler Classic 550
Originally a 196, this one has a 199 from a 69 American.
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Trader View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2023 at 10:53am
232 idle factory specifications were 550 to 600 RPM depending on year, 5 typical but up to 10 degrees advance for some applications.
Fine tune it with a vacuum gauge if you really want to know what the engine likes.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mtrosclair Quote  Post ReplyReply Direct Link To This Post Posted: Mar/26/2023 at 11:24am
Originally posted by Trader Trader wrote:

232 idle factory specifications were 550 to 600 RPM depending on year, 5 typical but up to 10 degrees advance for some applications.
Fine tune it with a vacuum gauge if you really want to know what the engine likes.

That is a tool I actually don’t have, I guess I need to get one.
1963 Rambler Classic 550
Originally a 196, this one has a 199 from a 69 American.
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FSJunkie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FSJunkie Quote  Post ReplyReply Direct Link To This Post Posted: Mar/28/2023 at 2:46am
Set the timing at 600 RPM then. Should still work fine. 
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1966 Marlin
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1973 Ambassador
1977 Hornet
1982 Concord D/L
1984 Eagle Limited
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mtrosclair Quote  Post ReplyReply Direct Link To This Post Posted: Mar/28/2023 at 10:05am
Originally posted by FSJunkie FSJunkie wrote:

Set the timing at 600 RPM then. Should still work fine. 

So I got a vac gauge and following procedure I found online I still ended up at about 10 degrees, it’s running pretty well now. 
1963 Rambler Classic 550
Originally a 196, this one has a 199 from a 69 American.
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Trader View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Trader Quote  Post ReplyReply Direct Link To This Post Posted: Mar/28/2023 at 10:24am
That's just fine. 
Don't sweat over factory specifications like this that are decades old with much different fuel.
My neighbor's 1929 Hump Mobiles, straight 8's, he was trying to tune them to factory specification and they ran like crap at 0 degrees advance, 400 RPM idle. 
5 degrees, carburetor adjustment, 500 RPM idle, 91 octane fuel and they run like a charm now. Spark plugs on that thing are massive things and dual point distributors in 1929!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1948kaiser Quote  Post ReplyReply Direct Link To This Post Posted: Mar/28/2023 at 10:54am
are the flat springs that hold the cap on are they tight or loose?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mtrosclair Quote  Post ReplyReply Direct Link To This Post Posted: Apr/03/2023 at 9:15pm
Originally posted by 1948kaiser 1948kaiser wrote:

are the flat springs that hold the cap on are they tight or loose?

I'm not sure which springs you're referencing? 

Also, I'm still getting a little bumpy idle, its not bad but I feel like it should be smoother.  
1963 Rambler Classic 550
Originally a 196, this one has a 199 from a 69 American.
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