Edelbrock carb runs awful for 4 mins, then gets better...ideas?

[AKcharger]

 I have an edelbrock 750 that runs awful for the first 3-4 min. Super rich, smokes acts like it's flooded/running on 4-6 cylinders. After a few minutes, it clears up and is fine. Any quick fixes or suggestions?

- Electric choke and seems to be opening ok
- Exact same issue on both '72 and '70 so it's not the car
- Issue started about 2 months ago
- 18 months old

Thanks in advance

[RECHRGD]

Sure sounds like a choke issue.  Have you witnessed it actually going from closed to open?

[alfaitalia]

Start it 4 minutes later....problem sorted!

[AKcharger]

Sure sounds like a choke issue.  Have you witnessed it actually going from closed to open?

Not really, choke closed when I start and after it gets running better choke is open. But it's not acting so much as a stuck choke as a stuck float that's dumping gas like crazy

Alfa...

[Back N Black]

Check float level in carb, could be too high.

[Mopar Nut]

I've never had good luck running edelbrock's, sounds like the same problems I had.

[AKcharger]

Check float level in carb, could be too high.

I'll look at that, maybe one stuck?

Molar nut, I'm kinda with ya, seems millions of people make them work well but best I can do is make then work...OK

[AKcharger]

Well, it's working OK now that I put it on my '70. I think a faulty ballast resistor on the '72 might have something to do with it? When I install a new ballast resistor I move the carb back nd see what happens

[Simonic]

After watching your gif for some time.........
I'm interested to see how you get on with this carb. I tried for some time to run one on a big block and had various problems. I went to the 650 AVS and found it to be a much better carb and easier to set up.

Good Luck 

[AKcharger]

They work, but I can tell there's a lot more power both engines could make with a proper set up. But I value commonality between both cars so I can swap parts...Like I did and simplicity and drivability. One day I'll have to pull the trigger and get a Fuel injection set ups.

lol...up gif is much better than the "save the chickens gif I used to have

[W4ATL]

I have one with the exact same issue since it was installed. It cranks great but acts like it's rich for a few minutes. I manually open the choke after cranking cold and it idled much better, so I adjusted the electric choke so it opens faster but that doesn't help the problem and it actually stumbles worse on takeoff until it warms up. So I can adjust the electric choke to run rich for the first few minutes, or stumble on takeoff.  Otherwise, the carb is great once it is warmed up. Great throttle response, no hesitation on acceleration like with the old AVS I never could get quite right.

[c00nhunterjoe]

If you put it on another car and dont have the issue, its clearly not the carb. The carb gets blamed for everything. Check for hot spark, whats your initial timing?

[AKcharger]

If you put it on another car and dont have the issue, its clearly not the carb. The carb gets blamed for everything. Check for hot spark, whats your initial timing?

Hi coonhunter, yup, I'm targeting the ballast resistor, after about 5 min running it gets so hot you can't touch it, I'll swap that out next week

[Back N Black]

That's normal for the ballast resistor to be too hot to touch.