1/8 throttle miss 198 Duster

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Mopar92

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So the car starts and runs great cold or hot. The choke works properly. Wide open throttle runs strong. No miss or hesitation. 1/8 or so throttle there's a miss. It doesn't have to be from acceleration. I actually think the accelerator pump is strong. If you stomp it, it accelerates. It's just cruising at a high idle or 1/8 throttle it surges and just doesn't run smooth. All other throttles it's a champ. I am not at all familiar with these little carbs. Here's the carb that's on it.
 

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The canister on the passenger side fender is still all hooked up. Can that thing wreak havoc on partial throttle performance ?
 
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