hey man . from what your describing could be any number of things from ignition , timing , fuel filter which is prob what it is . possibly injectors clogged up need to be cleaned . new dizzy /coilpacks ?plug wires. lots of things can rob you of power and performance yes there is a difference. lol you have to go into more detail for any of us to be able to help you and just so you know not many guys in here mess with much else other than V8s but when it comes to troubleshooting any motor over the internet you have to be very descriptive in any kind of behavior the car has . ill try to give you any advice i can and relay my personal experiences to ya

shoot me a pm if you have any ?s