Does this seem a tooth off? I’m running a little rough but I thought if I was a whole tooth off it would be really rough. I think I’m supposed to be pointed between 3&4 right?
Distributor Position (2 Viewers)
- Thread starter Jaws87
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- Thread starter
- #3
Thanks! That’s what I thought, but I figured I’d ask. Now I’ve got to figure out another reason for the rough idle. Checking valves today.
- Thread starter
- #4
I guess I should also note that it is set to TDC on the compression stroke, so it’s not 360 off or anything. It’s not that rough.
CondeCruiser
SILVER Star
Mine pretty much points right at #4. Check vacuum. It will cause rough idle.
- Thread starter
- #6
I’ve got 15 to 18 right now. I adjusted the valves (which needed it) now I’ll run through everything else. Thanks!
Green Bean
GOLD Star
What is your timing set at?
Old gas - top it off with hi test and a bottle of gas dry, then go for a drive. Water wet fuel filter doesn't pas gas well. Scrape the aluminum contacts inside the dizzy caps.
- Thread starter
- #9
I will check that out. Thanks!
- Thread starter
- #10
That's the weird thing, I have to advance it way past the 7 degree bb in order to smooth it out at all. Anywhere near TDC or 7deg and it runs horribly. Would this be a coil/resistor thing? Distributor? I figure it's got to be a sign of something.
Vacuum leak?
Also, you have a vacuum retard distributor. Is the vacuum line connected when you set timing? Where does the vacuum line connect to?
- Thread starter
- #12
No I take that line off and plug it. It’s running to my emission control box per a thread I found which showed where to connect the ports from the box.
Okay. Have you used a vacuum gauge to assess intake manifold pressure?
- Thread starter
- #14
I've taken pressure at the brake booster, but not directly from the manifold I guess.
I think that's sorta normal. I need at least 20 degrees advance to drive mine.
Green Bean
GOLD Star
For what it’s worth: On our 1970 with the original F engine, I’ve tried setting the timing at 7 degrees advance and it runs like crap. At about 28 degrees advance I get about 22 vacuum and a nice idle at 650.
There is something wrong with your setup.
Mark W
Yep, it's true. I just don't care that much.
Green Bean
GOLD Star
@Mace and @Mark W I completely agree, and I would very much appreciate any suggestions. But after pulling and re-stabbing the distributor countless times, I haven't a clue as to what is the issue. I would be much happier if it were a 7 degrees advance. But doing so means I have to turn the idle way up to reach 600-650. The main reason I gave up chasing this issue is that the engine actually sems to perform quite well on the current setting. Starts quickly, idles smoothly with no choke, good vacuum... Sorry for the hijack....
