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HELP!!!! 4.0l engine problems
I have I 99 B4000 M/T, flowmaster muffler, magnaflow cat, K&N FIPK II intake. My engine is lacking power throughout the rev range but is most notable on the highway. I have trouble maintaining 65 if there is even the slightest hill, which usually requires downshifting and putting it to the...- kas5267
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- Replies: 2
- Forum: 4.0 Liter Forum