RE: 68 ignition trouble
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RE: 68 ignition trouble - 6/23/2007 9:23:26 PM
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pg
Posts: 1044
Joined: 8/7/2006
Status: offline
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Hi ax, congratulations on getting a vette and welcome to the forum. I'll try to answer some of your questions and then I have some for you. Yes you should have two wires connected to the + side of the coil. (and a condenser), when you turn the key to on (or run) voltage goes thru a resistor wire to the coil, when you turn the key to start you get full battery voltage thru the other wire on the coil as soon as you put the key back to run your back to getting voltage only thru the resistor wire.
Can you tell me what you have done since it ran last?
Is the point gap at .019 ?
Was the distributor out ?
Do you have the cap wired with the correct firing?
Got any books like a Haynes manual?
Hope this helps, PG.
_____________________________
my Vettes birthday, May 1, 1974
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RE: 68 ignition trouble - 6/24/2007 9:23:49 AM
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ax
Posts: 52
Joined: 6/22/2007
Status: offline
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Hey PG,
got the gap set at .19.....also have dwell meter set ao 30.
Dist was out to clean....was replaced at TDC cyl #1 with rotor at about 45 to front pass. side of motor.
wires are correct.
It will run, just seems to miss and stall low RPM.
can you discribe the resistor wire so I know what to look for?
and I do have a shop manual.
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RE: 68 ignition trouble - 6/24/2007 10:45:09 AM
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pg
Posts: 1044
Joined: 8/7/2006
Status: offline
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Hi again Ax, you say the distributor was out are you sure you didn't miss by one notch on the dist gear? Wheres the timing mark at?
In the Shop Manual on page 13-18 is a "Starting circuit diagram" outline,
on page 14-20 you'll find the actual diagram and all the other info. PG
_____________________________
my Vettes birthday, May 1, 1974
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RE: 68 ignition trouble - 6/24/2007 12:48:15 PM
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ax
Posts: 52
Joined: 6/22/2007
Status: offline
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Timing mark at "0" TDC when Dist was installed.
The Dist will only fully seat in a couple of positions.
I did check the wiring diagrams, but will double check them.
Thanks AX
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RE: 68 ignition trouble - 6/24/2007 1:45:32 PM
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pg
Posts: 1044
Joined: 8/7/2006
Status: offline
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Ax, if you reinstalled the distributor like the book says on page 4-4 and everything else is correct, than you've got me. PG
_____________________________
my Vettes birthday, May 1, 1974
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RE: 68 ignition trouble - 6/24/2007 2:30:06 PM
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ax
Posts: 52
Joined: 6/22/2007
Status: offline
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Yea, I'm startin to think the new plug wires have too much resistance for the old system.
I can get it to run but it still misses at low rpm. especially when I put it in gear. The thing I can't figure out is why I can get the plug to fire when I pull the plug wire off the cap and let it arc from the cap to the wire.
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