Ok to give you some history I just built that motor. Everything ran fine till tuning.... Any ways go out for a street tune. I can full throttle the car and go through 2nd hit 3rd went through it fine full throttle. during tuning some half throttle pulls slow and gradual you hit 6k rpm and the car will sputter like crazy bot litk pop... pop... pop... but like a machine gun pppppppppppppppppp and you can gas through it to 6500 third gear does it at about seven thousand. tuner has only experienced that with a motor running to rich. but air/fuel looks fine at those rpm. stepped it up to ten lbs this happens at 4 6 7 how ever it is only on anything less then full throttle. if I full throttle it go right through it and on to the next gear...

The distributor is new got it online at a1 auto
i replaced the cap and rotar button thinking it might be cheap or something didnt solve issue
i bought brand new ngk plug wires and plugs gaped at 28
then I thought it might be the plugs sounds like spark is blowing out so I got new plugs and gaped them down to 24-25 still same problem...
I was hoping some one out there has had this prob and can tell me a solution it is all stock ignition didnt finish tuning 10lbs because of that want to find out what that is and why it is doing this. Please any help would be awesome!!!

 

??

 

anybody ??

 

maybe ur not getting enough fuel... get it tune on a dyno so it can get the right power band and get the correct fuel/air it needs to run properly

if u got turbo, maybe u need bigger injectors