TERRIBLE mpg

[csp713]

Hey yall i dunno where to start but to say that my 84 325e is getting shitty shitty gas mileage. what could be some causes of this? my console says 13.5liters when i hit the avg mpg button. This is just bad? and the car seems to run super rich when starting

[jlevie]

Check the cold start valve and the time temperature switch that operates the valve. A leaking valve or one that is on all the time are common causes of a ETA running rich. If those are okay run the suite of fuel system tests. And on a car of this age, the ignition wires could be bad and causing partial misfires.

[TheB1G Lebowski]

Check the cold start valve and the time temperature switch that operates the valve. A leaking valve or one that is on all the time are common causes of a ETA running rich. If those are okay run the suite of fuel system tests. And on a car of this age, the ignition wires could be bad and causing partial misfires.

Yep check your wires/cap/button/plugs make sure they are all good. Replace the fuel filter, and your O2s if possible.

[Quadrajet]

Don't overlook the "Paper Choke". And when I first tuned my eta I used Platinums, they didn't work so hot for me. Try and get the plain style plugs.