1968 to 1981 Automatic Transmission Won't Go Into or Slips Badly in Reverse
Yes, you are fortunate there is an adjustment!
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64 220se coupe bogs at full throttle and seems to run a little ruff at other times. when it does bog it sort of feels like it dies for a second or 2. i'm not at all familiar with this old fi system either. it doesn't backfire. the rest of the performance seems ok.