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  1. Advanced YJ Jeep Wrangler Forum
    I have a 1990 yj . 4.2 engine. Yesterday the guy who does the work on the jeep put in a new HEI dizzy and a new 2100 carb . The cat was taken off and hi-flow muffler put on before the carb and dizzy. The problem I was having before was that going down the road in 5th gear it would start to slow...
  2. Advanced YJ Jeep Wrangler Forum
    This just started yesterday. Starts fine, and idles fine, but when giving it gas it hesitates, no power and backfires thru the carb. I have replaced the fuel filter and cleaned the injectors. Any ideas before I have to take it to a dealer?:confused:
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