Bought it ran fine. A buddy touched something on carb. Now punch it she'l backfire. Can' figure it out. Driving me nuts. It pops then dies.

 

Welcome Aboard!

We'll need a lot more detail than that.

Does it backfire only once, or constantly on acceleration?

What carb? What Engine? What cam? It all makes a difference.

What is idle vacuum? What is base ignition timing?

Does it start well when cold? How about when hot? How about after around 20 minutes of heat soak?

Any idea what was adjusted or "touched?"

 

Just bought it. Ran fine. Came home buddy thought he knew what he was doing touched something. Now when I punch it back fires from carb. Cold it don' like. I bought it drove 60 miles back no issues

 

Find out what he touched and put it back.

Nothing easily accessible should have had a big effect really only the idle speed and mixture on the outside of the carb. Maybe the ported vs full manifold vac line for the distributor.

Most carbs dont like cold does it still have the choke?

Also

 

Make sure the choke is open.

Make sure the throttle cams are set to the "out of the box" setting (should be able to google that).

 

Yes has choke. When it stalls out my choke light comes on. Not to sure ain' plug wires.

 

Did he mess with the plug wires???

What are the answers to the other questions asked?

The choke light means nothing for you right now. Because someone hacked on an edelbrock carb the car does not have the factory choke. Did you visually inspect the choke plate?

 

I understand it has choke. . .every carb has a choke. I'm asking if you made sure it was fully open (i.e. the choke isn't engaged).

Cuz my guess would be it's very easy to knock the choke plate and mess stuff up.

 

I would not be surprised if the choke was missing people love to revive them.

 

Air filter was double the size of original that came with carb. Then my dizzy turned maybe 1/8 to right. Now running like a beast. Thank guys.

 

So your friend messed with the carb and it upset your timing?

 

Good deal. Sounds like he messed with your timing instead of the carb. . .

A good reason to be very picky on who you let under your hood lol.