Discussion Starter · #1 ·
Just bought a Holley ultra hp 950. Came with 72/74 jets. Prior to installing, I changed jets to 86/88. b/c my previous carb had 90, but was rich. I now have a stumble as soon as the squirters shoot, (mashing accelerator from idle). The tech line shows soooo many possibilities to remedy this problem. Was wondering if anyone could help, so I dont have to try too many mods, as I hate to start wrenching on a brand new carb. Also, the instructions claim that the jets should not need to be changed more than 4 numbers from what was installed @ the factory. Is this true, did I mess up with too much jet? We are 12' above sea level.