1991 f-150 5.8 HELP
#1
1991 f-150 5.8 HELP
My dads truck was acting up and had no power. I would press gas and rpm wouldn't go above 2000. I unbolted exhuast and it worked so we replaced the cats we thought were clogged. It worked good for a few days and then did the same thing again. Now it is backfiring through the air intake. Any ideas and fixes?
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