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  1. I recently purchased an ‘89 jeep Comanche sport truck with the 4.0 l motor with the 5 speed gear box and 4wd. The Jeep has sat up supposedly untouched since 2005 according to previous owner. Since buying it we dropped the fuel tank and we’re using a temporary gas can with a new fuel pump and lines. We took off the fuel rail and cleaned it. We checked all injectors and cleaned them out and put it all back on the truck. We check for spark and checked all plugs and it is getting enough spark for the engine to start. We checked compression on all cylinders and are getting around 130-150 on all cylinders except the back one which is getting around 90, albeit low, but not low enough to stop from running. We of course cleaned out the air box and stuck a new filter into it. At about this point of cleaning and checking and making sure, we try to start the vehicle and it successfully ran for a few seconds and shut off due to the brake clean sprayed into the holes while the fuel injectors were out. For the life of us, we can not get it to start. We have gone through and done all the checks previously stated and have accomplished nothing. We inspected closer and found the crank sensor was damaged and replaced it with a brand new one that we tested and installed, but still we get nothing. If you have run into a similar issue or have a lot of knowledge on these Comanches, please write back. I can provide pictures and additional info, but a point in any direction would be greatly appreciated.
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