I have a 93 Jeep Wrangle 4cly. 2.5l. I am having engine problems that I cant seem to find out what is wrong with it. Some times in the morning, it will not crank up, but again that is some times. I thought it was the fuel pump starting to go out. I checked the fuel pressure and it is 30psi. When I cut the jeep off the fuel pressure slowly falls. Not sure if it is suppose to do that. My next problem is that I can crank it, drive it 8 miles or so, stop for about 15min, get back in it, it will crank fine. But when i start to take off it acts like its losing fuel, then it will start back poping through the air breather box. a mile or two down the road it goes away and runs good. Its also a little slugglish on acceration. I have changed the throttle body postions sensor, water temp sensor, crank case sensor, new plugs, wires, and distrub cap. Can someone help me on this problem. Seems like it idles a little high, around 900-1000rpms.