What causes a car to run too lean?

Answer by  flconner (62)

Things that cause a car to run too lean include poor air circulation, carburetor out of adjustment, or choke is still on.

Answer by  Amber40 (24961)

Well this can be caused by a lot of things. If you are talking about a fuel injected car it is usually caused by the computer cutting fuel or a restriction in the fuel system like a bad pump or clogged filter. In a carbureted engine a lean condition is usually caused by too small of a jet size.

Answer by  heather88 (1897)

You will need to take it to a professional they would know what causes it. You should get it checked out.