No acceleration between 2000 and 3000 rpm

[sext7366]

Its like my 383 surges once I hit a higher rpm...it kindof jumps into the power band, but will not let me cruise at a lower rpm on the highway...previously it has been fine but after a good rain and lower temps the engine seems to be either too lean or too rich.  I am thinking the electric choke is the cause and I am thinking of switching back to a mechanical choke.  I had just switched carbs from an edelbrock 600 with a mech choke to a holley 770 street avenger w/ an elec choke.  Any other Ideas for things I should check.  Oh off the highway it is ok and does not have this problem, it only starts at about 60mph plus. I haven't seen anything like this!

[myk]

Maybe your secondaries aren't opening up all of the way? 

[grouseman]

We need more info.  What is your engine, ignition, carb, drivetrain setup.  What are the exact symptoms?  Have  you done any work lately? 

[sext7366]

383 2800 stall 727/torqueflite 3.23 suregrip engine bored 60 over with forged flattop trw pistons 230/236 cam windage tray headers an mopar perf elec ign.  timing was set about 500 miles before this started at about 15.5, and was running fine before. surges 2000-3000rpms and jumps into the power band where the power suddenly comes back on. it mainly happens on the highway.  I am thinking its the shitty holley elec choke. I had one before and hated it, and now its all comin back to me. A manual choke is much easier...especially on an f-ing holley!!!

[myk]

Well, disconnect the choke and see what happens...

[sext7366]

Had some time today and instead of disconnecting the choke I simply adjusted it so it barely stays open...basically after the car starts the choke shuts off.  It was still happening at this point but since I had the day off, I just brought my vacuum gauge and a few tools with me.  I adjusted the carb a little once and it got better... but didn't stop.  I am wondering if the crazy oklahoma weather is just messing with the carb.  Less than a week ago its over 90 and today the low tonight will be 68.  Anyway I am guessing it just needs fine tuned as the weather is fluxuating.

[dodge freak]

The choke should be all the way open. My holley hp does not even have a choke and runs fine. Well when the motor's first started for the day it idles rough but smooths out with in 5 mins. I live in Mich. and its been in the low 60's for half a day, I drive it in the 30's till the snow comes. You may have to jet up a few sizes. What size jets are in there now ? I would think 70-72 should be it but you need to find out what size the jet's are and go up 2 sizes and see if it helps.