I bought my 2nd gen Dakota about 7 months ago because the previous owner said it wouldn't start up first thing in the morning (which it didn't). I started tinkering with it by changing out little things here and there (MAP, crankshaft position, coil, plugs wires and cap). The truck will start and idle, but sometimes it will die driving down the road or even while idling in my driveway. I changed the front O2 sensor (upstream from cat), but not downstream. I don't believe that the downstream sensor is causing this kind of problem tho. Someone told me to replace the IAC, another person said replace the alternator, and I just want a reliable vehicle. Parts house says "no camshaft position sensor for your truck", but google says yes there is so idk who's right on that one. My exhaust leaks at the manifold gasket, and is cutoff just past the muffler. Any/all advice is welcomed. Also, the last OBDII scan showed me a dtc p0545 which is an EGT sensor code. Parts house also says "no EGT's on your truck". I should mention that it showed other dtc's 0300, 0301, 0303, 0305, and 0420. I disconnected the battery (as directed by O'Reilly Auto Parts) for about an hour to see if codes cleared because all were stored with none pending. Please help me out here. I just replaced my downstream o2 sensor, but I didn't fix the problem. My exhaust is cut off short where it exits the muffler. Still don't know what to fix next, but contemplating replacing the ECU.