Ignition problems?

[Collin the Hen]

So, I got my timing light today, hooked it up, adjusted it... spot on.
But, it still sputters and coughs and diesels. I cleaned the carb so it's fine, and my vacuum is steady at 18 Hg. Now the next component is the stock ignition. By the way, it's an 84 258 with a Motorcraft 2100.
Would a bad ignition cause dieseling?
Also, would a bad ignition cause an engine to run poorly until the rpms increase?
Any advise is much appreciated!

 

[PS89YJ]

Could it be you purchased some bad gas?

 

[redrooster]

Could be the ignition, but might still be the carb. Check your vacuum advance to the distributor. Did you have the vacuum advance disconnected when you checked the timing?

 

[Collin the Hen]

I don't think the gas is bad. I'm almost out, but not necessarily bad. Yeah, I disconnected the vacuum line, and plugged it. I didn't plug the actual vacuum advance though. The directions for my light just said to plug the hose. The more I think about it, though, I think it's a carb issue.
I've read that a hole should be epoxied on the base of the Motorcraft 2100. Is this necessary? :?|
My jets are 48, so I think those should be fine. I'll mess with the A/F mixture tomorrow and post some updates.
Thanks!