Let the 08 te450 sit in the shed without running for a while, battery went flat and now it runs like crap. Is there something i need to do to reset the ecu or similar? Has new plug and new fuel and a clean air filter.
Maybe a dumb question but did you charge the battery back up fully and check voltage? It should be holding well above 12v. Mine went flat and had enough charge to prime the fuel pump and would start by kicking but wouldn't actually generate enough charge to have it running nicely.
