Carbed LS engine stumble problem at 5500RPM!

[Rod P]

Carbed LS engine stumble problem at 5500RPM! any Ideas? driven and raced the car for 3 years and it just started about 4 weeks ago, I went to practice and right off the line the car hit 5500rpm and stumbled like a rev limiter,,,,here's what I have changed, and after each change a quick test run and the issue is the same

I thought maybe the MSD box, now new
bad Map sensor, now new
bad ground or power?, ran new wiring
bad coils?, 8 new ones
bad plug wires, now new
cam sensor faulty, new now
bad edelbrock carb, switched to a new holley
plugged fuel filters? I have 3 a post a pre and a carb filter, all 3 new now

ran out of ideas at that point, called MSD and they said alternator isn't charging? OK I'm game

now has a new alternator and an extra ground and a new charging wire and I have the same problem, just looking for any Ideas!!



any Ideas????