Motor runs on 3 cylinders until l accelerate

Car is a Vintage built in 2014 with 4500KM on it. Not sure of the engine build but has 2 45mm Weber carbs and has great power. Mechanic said the distributor has electronic points.

If you are running dual Weber style carbs they run on idle jet only until about 1/4 throttle is open. I have had this issue when the idle jet on this cylinders carb throat was clogged. Pull the idle jet and blow it out. This may fix the issue. If you continue to have clogged idle jets you may need more, and better fuel filters installed. The smallest containment will clog the jet. Hope this helps.

I hope so too. I’ll let the mechanic know. Thanks for the input. Have a great day.

Popee

Your mechanic probably knows this, but with the engine idling, pull the plug wires from the distributor cap one at a time to see what happens.   When pulled, each should make it run a lot worse except for one, and that one will have no effect.  THAT is the suspect cylinder to check the idle jet on.  

Great advice, I’ll let the mechanic know. I thought it might be the carburetor due the car running great on acceleration.

Thanks Gordon,

Popee

You have a plugged idle jet. Easy fix.

Ok, appreciate the reply. Have a really great day.

Thanks,

Popee