So I replaced the fuel injectors, fuel pump, and took off all the vacuum lines except for the MAP and the fuel pressure line. ( Talk to Jeep pro mech. And was told it would run better) even before I had all the vacuum lines had same problem. Jeep runs great, but anytime I step on the gas it still feels like there is a rev limiter. Now it does it when idle. And there is a sound. Almost sounds like backpressure. What do u think?

 

First off, your Jeep pro mech is wrong.

What kind of maintenance have you done?
Plugs, wires, cap and rotor?

 

Ive replaced the plugs, and clean Ed all the connections on the cap and rotor. Plugs look good, but did not replace yet. Was thinking about just buying all new next though

 

I would test the fuel pressure.