my Altima have been sitting for a while, every now and the car would lose all accelaration power what could this be
Bad gas and/or water in tank from condensation. One of many scenarios, depending on how long is "a while"
Dump in a can of "Sea Foam" in the fuel tank.
Search Nissan Altima Questions
Nissan Altima Experts
Related Models For Sale
Used Cars For Sale