Duraspark swap, help a noob with distributor please
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Junior User
Joined: Jun 2011
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From: Choctaw, OK
Was it kind of a winding down, out of battery juice sound when it was lagging? If so, you could have too much advance. It'll sound like that when the advance is too much and the starter is getting kicked back by the engine. Definitely something to address or you'll wear your starter out.
Sounds like your timing is really, really close, but again sounds like too much advance.
If it were me, I'd get yourself a really good vacuum gauge.
This is THE best way to set your engine timing.
1. Hook your vacuum gauge to DIRECT manifold vacuum. If it's a port right out of the manifold, great.
2. Disconnect the vacuum advance from the distributor and plug it off so there aren't any vacuum leaks.
3. Loosen the hold down bolt on the distributor and gently rotate it until you get the MAXIMUM amount of vacuum you can possibly get.
4. Back the timing down until the vacuum drops 2hg from the maximum you were able to achieve. So, if you could peak it out at 20hg, back it down to 18.
5. Tighten down the distributor and hook the vacuum advance back up.
Now, do the same with the idle mixture screw on the carb. Turn it until you can get the MAXIMUM amount of vacuum possible at idle. If it raises the RPMs above idle (750), lower the RPMs to 750 and adjust the idle mixture again. Repeat until it stabilizes and you have the best vacuum possible.
If you really want to be sure it's set the best, go back to the timing and do it again.
Your engine should run like a champ!
If it were me, I'd get yourself a really good vacuum gauge.
This is THE best way to set your engine timing.
1. Hook your vacuum gauge to DIRECT manifold vacuum. If it's a port right out of the manifold, great.
2. Disconnect the vacuum advance from the distributor and plug it off so there aren't any vacuum leaks.
3. Loosen the hold down bolt on the distributor and gently rotate it until you get the MAXIMUM amount of vacuum you can possibly get.
4. Back the timing down until the vacuum drops 2hg from the maximum you were able to achieve. So, if you could peak it out at 20hg, back it down to 18.
5. Tighten down the distributor and hook the vacuum advance back up.
Now, do the same with the idle mixture screw on the carb. Turn it until you can get the MAXIMUM amount of vacuum possible at idle. If it raises the RPMs above idle (750), lower the RPMs to 750 and adjust the idle mixture again. Repeat until it stabilizes and you have the best vacuum possible.
If you really want to be sure it's set the best, go back to the timing and do it again.
Your engine should run like a champ!
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Joined: Dec 2007
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From: Boise, Idaho
Ah, if it hesitated and then fired, it's probably dirty/bad battery cables, or something similar like Rogue said.
Also, it normally doesn't ping at idle. Or at least not that I know of. Maybe just a little bit of lifter ticking or something?
It very well could be that your timing is pretty decent.
Although a good tuning with a vacuum gauge really puts it in its sweet spot.
Good work!
Also, it normally doesn't ping at idle. Or at least not that I know of. Maybe just a little bit of lifter ticking or something?
It very well could be that your timing is pretty decent.
Although a good tuning with a vacuum gauge really puts it in its sweet spot.Good work!
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Junior User
Joined: Jun 2011
Posts: 64
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From: Choctaw, OK
About the "lagging" when you go to start it. Is like a delay from the time you turn the key until the starter begins to spin? If so, check your battery cable connections, I bet you've got one that's about to start giving you fits.
Congrats on getting it started.
Yeah, the dist not wanting to drop in that last ~1/4" or so is the oil pump drive not lining up. There's 2 ways to deal with it. The way you did it, and using the breaker bar/socket to wiggle the crank a bit. Whichever is easier, is the way to go. The dist typically has more than enough room to twist to make up for the minor timing tweak needed to line it all up.
Congrats on getting it started.
Yeah, the dist not wanting to drop in that last ~1/4" or so is the oil pump drive not lining up. There's 2 ways to deal with it. The way you did it, and using the breaker bar/socket to wiggle the crank a bit. Whichever is easier, is the way to go. The dist typically has more than enough room to twist to make up for the minor timing tweak needed to line it all up.
Thanks! =D
Good to know about wiggling the crank, I didn't think to try that but will be handy for in the future.
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