|
When you say "4Barrell wont open" you mean the large secondary's right? Try checking the secondary lockout lever and/or the vaccum break diaphram. Unlike a mechanical secondary (double pumper), the vacumm type secondary's are not directly connected to primary linkage.In the old school days guys used to get diaphram spring assortments and put in weaker spring, thus allowing less engine vacumm t open the spreadbore. But not too much to where u get a flat spot when floored.
|