97 Silverado Power Lose

By joe dirt
January 4, 2008 in Ask A GM Technician

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joe dirt

Posted January 4, 2008

I have just bought a 1997 3500 4x4 with a 454vortec 5-speed and only 58,000 miles on it. When ever I'm at WOT it pulls good until about 3000-3200rpm then it just flattens out unless I let off a little then it pulls on real strong but then it's at the red line (4300). I know big blocks don't turn alot of rpm but it dosen't pull to it's red line. Whats the reason for this problem? It already had the k&n fipk kit and dual magnaflow exhaust on it. I did notice a little miss when I would switch gears (normal driving low rpm) that I don't notice anymore. I have also noticed a very little antifreeze along the intake and head on both sides but not in the oil.

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