hello, i have a 1886 chryles 5th ave. runs good, almost grate. thats why i bought it. however it seens to misfire, (at least i think its a misfire) it sounds like a muzzed pop from under the hood. it only happens when i apply pressure to the accelerator and when i release the accelerator.
i have checked for vacum leak, have not found none. this is only issue i have with the car. please help. thanks