Sensors? Computer issue? Fuel problem? PLEASE HELP.

What is your question?

Head gaskets were just done, distributor replaced, and new radiator. Car is still in the shop, it sounds like a go cart, doesn't go into second till rpm hits almost 5 (I have no idea what the terminology is for that) and temp gauge is again trying to max out. Sensors? Computer issue? Fuel problem? PLEASE HELP

How long has your 2000 Nissan Altima had this problem?

2 months