Ok so I have had my truck about a month now. The first week I had it I did a full tune-up (distributor cap and rotor, plug wires, plugs, air filter, and coil) now almost as soon as I did this my CEL came on. So I plugged in my scan tool and looked up the trouble code and it was a misfire on cylinder #5. After a couple of weeks, a 180 degree thermostat cause on another forum they said that was better than the OEM....it wasn't now the truck won't heat up past 187 and the problem was actually the coolant sensor. I replaced the coolant sensor and now at least the truck is going into closed loop mode, but still has a CEL. Well after checking plug wires, plugs, cleaning up the throttle body and replacing the IAC, running some seafoam in the tank and through the intake manifold still no change. Oh and I should've said this earlier but when the light comes on it'll idle rough, and when you put it in gear and take off it shutters. It'll smooth out when you get above 10 MPH. I have a plenum repair kit from Hughes on order and last week when i was taking my kids to school I pulled into the school parking lot and the truck just died and wouldn't start. Got it to the shop and the metal strip on top of the distributor rotor was gone and where it use to be was a 1/4 inch scorch mark
. Replaced it with another and made sure everything under the cap and the cap itself went on good. Started it up and guess what nothing changed
. So I looked into it and found out my cat is gone and one of my oxygen sensors isn't switching fast enough. Would someone please give me some advice on where to look next. Is the plenum my issue cause if so that'll be fixed the end of the week. Any help would be appreciated it feels like all I've done is thrown money at the problem and I have nothing to show for it except a reduced pocket book. Sorry this is so long just wanted to try and give all the details I could remember. If it'll help I'll try to attach the info from my scanner tomorrow. Thanks in advance for the help.