OK i have a 93 yj 4.0 and now this thing is not letting me rev pass 3000 rpm but idles perfect.
Today as i was going home from work. i notice my jeep started to bogg. i got home and in the drive way i was trying to let it rev pass 3000 but she spudder's. i then add a fuel injector cleaner and let the car cool down. went to the gas station with no problems as i was going home same thing. so i decided to check the ignition (i just did a tune up a month ago when i first got the veichle) i hook up my timing light to each wire and the thing is lighting perfecly. so could this possible be my fuel pump but why would it only do it when the car warms up. i'm not to sure the temp also because when i got the vehicle the temp sensor is not there.

thanks for any ideas
lee