I want to start with to I'm very new to owning a bronco (my first non modern vehicle). Over the last two years I had a bronco built for me. Full off-frame restoration that was suppose to take 6 months and because of these I didn't end on the best note when getting my bronco and won't go back to the shop that did 90 percent of the work because they would continue to lie about what they were doing until I would show up and see they hadn't done anything. After receiving the bronco I was able to drive it about 20 miles to my house before it cut off on me. I did all the standard checks to see what it could be and I thought it wasn't getting fuel. It has a fully rebuilt 351w with fuel injection. Had another local shop run some test and they informed me it was my hi fitch 4 barrel carburetor. I had them order a mean street hi tech new carburetor a little more expensive then the one I had before from hi tech but was rated for higher horse power (800hp) so no big deal. Got the bronco back with 92 miles on it since build. I had been very cautious driving the car because I thought it might be running a little hot cause it would run from 190-200 but my understanding that is okay now. but while driving it about 55 mph and it was running about 190 it cut out on me once again about 120 miles on it. While I sat there thinking why didn't I just buy one that already worked and not wasted two years having the perfect one built it magically started. I did notice the coolant was low so I added some more but that his strange cause I had added coolant when it first died before getting the new carburetor. The car almost made it another 2 miles to my house before cutting out a final time. I can't figure out what could be the problem since everything is brand new from other than the engine being rebuilt. Im sure someone had a tread out there similar to my problem but I couldn't find it.