In need of help!
I've been working on my sister Laredo and the initial suspect was a warped head so we replaced it and since I was in there I changed the rods and lifters. I also cleaned all the crap out of the injectors and the intake manifold, replaced all the upped gaskets (head gasket, intake/exhaust gasket, valve cover gasket, throttle body) I also sprayed out the throttle body with air flow sensor cleaner as well as the air temp sensor. Now that everything is back together we had to jump it since it's been sitting for about 2 weeks, when we cranked it up started up with a little push of the throttle and it's idling at nearing 3500 rpms in park. In drive there is the worst tapping noise I have ever heard while it's idling at 2000rpms. I've changed the oil and coolant and have absolutely no clue and theres an odd burning smell, almost smells like electrical. Any help would be greatly appreciated!
Tl;Dr: Changed heads, gaskets, lifters, push rods, cleaned throttle body and intake manifold and now it idles at nearly 3500 rpms. Any idea what could be going on?