i have a 1985 f=150 with a 302 f-inj. it keeps choking down or just stopping it also sounds as if it backfires through the throttlebody. has new plugs ,wires. drist.cap rtr buttn. have replaced two parts on throttle body also.truck wont idle rigth until it warms up runs fine in park but when put into gear it sorta starts out fine then it bogs down hiccups, backfires through the throttle body and chokes down truck starts back up right after only to do it again.
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