Where can I find a diagram of the air mass meter on a 2000 Dodge Ram 1500?

The after market air filters if not prperly cleaned and oiled can contaminate the air flow meter. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online Check for vacuum leaks!

are you sure its the mass air flow? what codes come up in the computer?

your truck doesn't have a mass air flow sensor put the stock one back on they put the air temp sensor in the snorkel for the air cleaner make sure yours is there