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Old 03-29-2021, 11:53 AM   #22
Oldgearz
Senior Member
 
Join Date: Aug 2020
Location: Sagle, Idaho
Posts: 359
Default Re: Engine stumbles on acceleration

Recently rebuilt me B carb for my 30 Coupe and the car stumbled badly on acceleration. Took it apart and compared new parts to old parts and found the main jet on the new part was considerable narrower in diameter than the old part. Put the old jet back in and the car runs perfect. As is nearly universally agreed, some reproduction parts just don't muster up. Compare the parts you took out to the new parts you put in.
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