I need some help

[pb24]

I have a 68 charger with a 383, The motor is stock as far as i know. I just replaced the carb with a Holley 650cfm. Now when your cruising down the road with your foot barley on the throttle has a hesitation and starts popping through the carb, When you step on the gas and the RPM increase it goes away.
It had a similar problem before a replaced the carb. I'm running a Mopar electronic ignition my first distributor didn't last very long and it was replaced with another one it seems the bracket that holds the magnetic pickup had a lot of play in it and most of my problems started after switching over to electronic ignition. I'm wondering maybe a burnt valve or is it the distributor causing the problems.

[67_Dodge_Charger]

It might be running lean..... Plus timing needs advanced.  Hopefully it is not a valve or a dead cam lobe.  I would lean towards tuning.

Robert

[pb24]

Ive been playing with the timing and it doesn't seem to make much of a difference

[pb24]

If I wanted to put the stock distributor back on to see if it made a difference would i just have to run a wire from the low voltage side of the ballast resistor to the positive side of the coil.

[j m w]

CHECK FOR VAC LEAKS/

[ACUDANUT]

For a big block, you really need a Holley 750 or bigger. 600's are for small blocks.

[pb24]

how much vacuum should I have at idle

[ACUDANUT]

 Hmmm, I never had a electronic distributor go bad.  It must be another problem.  You went the right route though, by getting rid of that points distributors . 

[69chargerR/T]

Did you check the air gap on the new distributor.  It has to be set,they are never right. 

[ACUDANUT]

Did you check the air gap on the new distributor.  It has to be set,they are never right. 

Air gap ? I never had any issues like that. What do you mean. ?

[69chargerR/T]

Air gap is the gap between the reluctor  ( the part that looks like a gear under the rotor ) and the pick-up.  Its like setting points, there has to be I think its .008 or .010 gap between the reluctor and the pick-up. And you need to use a brass feeler gauge. I put a MP distributor in my car and it didn't run right, I checked the air gap and it wasn't right. I set the air gap and it fixed the problem.

[pb24]

If you look at the air gap it is narrow at the bottom and gets wider at the top so its almost impossible to set. The metal bracket that holds the magnet has a lot of movement. That's why I want to try the points distributor to see if it makes a difference. I thought I read on the FBO web site that he machines your distributor to align the magnet and the stator.

[pb24]

There are total of four wires on the batast resister two on the high voltage side and two on the low voltage side. On the low voltage side one goes to the ECU and im gussing that the other wire is 12 volts at start up. but whey are their two hot wires on the high voltage side.

[pb24]

Anyone?

[Al]

Too much vacuum advance. Try to disconnect the vac line to the distributor, plug it and see if it runs better.
Al