temp does any one know why? When driving down the highway at running temp my jeep will start to lose power when I push down on the gas pedal. Does not do this when cold, only when running for a while 20 minutes or more. We have changed the Catalytic converter, one of the O2 sensors (the one in the catalytic converter) fuel filter, spark plugs, PCV valve, MAP, Distributor cap and rotor. Does anyone have any other ideas. At running temp also I can hear the fuel pump in the rear of the truck and when idling sometimes seems like it is surging. Could there be something wrong with it. If so is the fuel pump for the 96 interchangeable with one from 95 as we have a parts truck here but not sure if we can use that one or not. We are also wondering about timing. Is there a way to time this jeep, and if so where are the timing marks. Any answers would be greatly appreciated.