horse power loss around 3000rpms?

98 jeep wrangler with a 2.5 ltr 5 speed. I drove on the interstate this morning and didn’t really notice a severe change to the response in power. however this evening on my way to a club, i couldn’t get over 60 mph. with the exception of the lower gears 3000rpms is dificult to acheive. (typcal idles around 900rpms) in 4th and 5th gear around 2500 rpms is about as high as it will go. in addition to this while driving in 3rd gear and trying to go higher then 3000rpms the engine begins to sputter, but doesn’t die. when in nuetral or with the clutch depressed the engine will respond well to changes in the gas pedal. But with resistence to the engine the above results apply. having only a 2.5 ltr its never been a power house. but i only really had a problem doing 70-80 with heavy winds or the top off (different aerodynamics.) So i’m asking for hints for what to look for, or ideas to resolve the problem. thanks for reading and any help you may offer.

, , , , , , , , , ,

2 Responses to horse power loss around 3000rpms?

  1. musiclicker May 22, 2010 at 8:01 pm #

    Is your fuel filter clogged, or the fuel return line clogged? Could be a bad throttle position sensor, clogged injectors, Timing belt on the way out, or the exhaust pipe is clogged or bent. A loss of power is usually a sign the timing belt is stretched and/or getting ready to break. Clogged injectors might not be letting it get enough fuel, or the air filter could be clogged preventing it from getting enough air. Better get it to a mechanic right away because those little engines will wreak havoc when the timing belt breaks. Better to pay a little now, than a lot later.
    Glad I could Help. Good Luck!!!

  2. justanotherengine May 22, 2010 at 8:01 pm #

    Check spark blug wires for cracks, my mustang did that, found a crack on a plug wire WAY in back, it was shorting out only when under a "LOAD" on the motor like you said.