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1986 2.5TBI AX4 with 4wd I haven't wrenched on my Comanche for a while because I still can't figure out why it randomly dies on me. It will idle until its out of gas but if you start driving it'll randomly die on me, could die before i get out of the driveway or 5 miles down the road and when i cycle the key it will run for another minute or two before shutting off again. I have spark and fuel until the engine stops turning. Had a fancy diag guy come out with an oscilloscope and he also checked all the sensors but that got me no where. Ive also replaced/cleaned all of the grounds and electrical connections that Cruiser recommends but still no improvement. Fuel Pressure is steady 15psi at the TBI. I keep running into dead ends on the electrical system and I want to yank it all out and make it carbureted like god intended. I was thinking about pulling out the AMC 2.5 and throwing in a GM 2.5 so i can get a vacuum advance distributor and an intake manifold for a carb. I wanted to see if anyone has any better ideas or if anyone has done something similar. I am newish to posting on forums so if yall have any links for old threads on this topic please send them my way! Thank yall for all the help so far, can't wait to get this MJ back on the road!

Hey everyone. I need help with my Jeep from the gurus here. Its a 1991 2.5L 4 cyl engine with the fuel injection system. It has the injector per cylinder setup on this. I have pretty much replaced all of the sensors on the engine, cleaned it all up inside and even added new main bearings and connecting rod bearings as they where shot when I bought the car. Since doing all the work, the engine has been running smooth and the truck runs alright. But I do notice a lack of power; I know its the 4 cylinder, but I always have to give it good amount of gas to get it going. My biggest headache is that I am getting about 12 to 13 MPG, which I think its insane! I have no leaks on the intake, fuel pump, filter and all those maintenance items are new as well. The only thing that I recall not checking before was the position of the rotor in the distributor when installing a new distributor I got. I used the haynes manual and it stated that when installed, the rotor should be at the six o clock position when you are standing on the side of the engine. The front of the engine is to your right shoulder and the back to your left and you are staring right at the distributor in front of you. In this six oclock installation, I couldnt even get the engine to start. I could feel that the engine would try to start and it would stop the started right away. In a way I feel that it was too advanced. I then began to look around and some other sites are listing that the rotor should be installed at the 3 o clock position, essentially poiting forwards. My question here is. What is the correct rotor position for a 2.5L 1991 Engine with the port fuel injection electronic setup? Any tips here? What other areas could be causing my poor fuel economy? Crank sensor at the rear of the engine? That is pretty much the last sensor I havent touched... Any ideas will be very welcome. At this point i want to drive this daily but with a 12 MPG thats a little absurd...