fill out your profile. there might be someone in your area that can help.

 

Try replacing the distributor itself

 

I wouldn't suspect the ECU because it mainly controls the carburetor, not the ignition. About the only thing you haven't replaced is the pickup unit inside the distributor. I would either replace it, or swap out the whole distributor (as Whitesol suggested). HTH

 

What about the ignition module (sp?) I replaced mine and it helped out? Not sure if thats your problem or not, but they are cheap and easy to put in. Is that the same as what your talking about MrSurly (the pickup unit)?

 

The dist is a good Idea to try. Other possibilities:


Bad grounds; 2 of these, one at the battery to the firewall, and another at the dist to firewall.
My dist ground was broke inside the insulation giving intermitand misses.

Dirt in the float bowl, grit can some times plug a jet and cause it to run weak, simulating a miss.
Or fine dirt can float around the emulsion tube, pluging the tiny holes in the tube intermitantly.
Same result. I have found that small engine carbs that use emulsion tubes are prone to this trick.

The fact that the miss goes away after shutdown may indicate the emulsion tube prob. It all
floats down to the bottom after shutdown, clearing the "miss".

 

That sounds like the same problem I am having. It's very intermitent and if I'm pusing harder than normal for an extended period of time I loose power when "it" happens, it's kinna like someone is closing the throttle plate, but my foot does not move. I thought it was my sparks were too hot, nope, I have not drained/done anything to the carb as far as cleaning it were to go.. It's not weather related, does not seem to be temp related, it just happens.. It'll idle like crap and usually stall, then it'll be real hard to start, I've got my clutch plate wedged open, so It can't be that..
I dunno, I'll be going to a weber soon, maybe that'll solve any weird problems I have..